Many terrorist attacks have occurred in Kenya during the 20th and 21st centuries. In 1980, the Jewish-owned Norfolk hotel was attacked by the Palestine Liberation Organization (PLO). In 1998, the US embassy was bombed in Nairobi, as was the Israeli-owned Paradise hotel in 2002 in Mombasa. In 2013, the Somali jihadist group al-Shabaab killed 67 people at Nairobi's Westgate Shopping Mall. There have also been many other attacks.

Background In July 1976, President Jomo Kenyatta allowed an Israel Defense Forces task force to cross Kenyan airspace and refuel at Jomo Kenyatta International Airport, on its way to Entebbe International Airport in Uganda. Israel required help from an East African country for the success of its Operation Entebbe raid to extract people from a hostage crisis. Without it, Israel lacked the logistical capacity to aerially refuel four to six aircraft so far from Israeli airspace. Perceived as Western interest and Israeli support, this incident was responded to with anger from Islamic extremists.

Major incidents 1975 Nairobi bombing and JM Kariuki murder

In early 1975, the first bombs to strike independent Kenya exploded. In February, there were two blasts in central Nairobi, inside the Starlight nightclub and in a travel bureau near the Hilton hotel. The day after the second explosion, JM Kariuki revealed in Parliament that his car had been hit "by what seemed to be bullets". There were rumours of a botched attempt on his life. They were followed by a more serious blast in a Nairobi bus on 1 March, which killed 30 people. Despite a massive public outcry and a police manhunt, no arrests were made. For several days thereafter, the city lived in fear, destabilized by numerous telephone bomb hoaxes.

On 2 March 1975, the day after the OTC bus blast, security officials including General Service Unit commander Ben Gethi publicly accosted JM Kariuki outside the Hilton hotel. Various police officers, including police commissioner Patrick Shaw, had been following JM throughout the day. Gethi asked Kariuki to accompany the security officials into a convoy of cars and took him to an unknown destination.South Africa History Online. Sahistory.org.za (2 March 1975).Charles Hornsby. When Kenyatta Lost Control on Event in government . Tommboya.org.

The bombings stopped after the news of the disappearance and murder of JM Kariuki became public.Mwangi Githahu. Star Newspaper. Could string of bombings be a screen for assassination plot?

1980 Norfolk Hotel bombing

The Norfolk hotel in Nairobi, owned by a prominent member of the local Jewish community, was bombed on 31 December 1980. The bomb killed 20 people of several nationalities, wounded 87 more, and destroyed much of the west wing. It was believed to be an act of revenge by pro-Palestinian militants for Kenya's supporting role in Israel's Operation Entebbe.

According to reports about that incident, international security agencies in conjunction with the Kenya Police had a prime suspect within hours. He was identified as 34-year-old Qaddura Mohammed Abdel al-Hamid of Morocco, and he was said to have checked into the Norfolk Hotel in Nairobi in the last week of 1980. Al-Hamid was found to have paid for his room up until New Year's Day, but slipped away on the afternoon of 31 December. He had boarded a plane for Saudi Arabia by the time the guests at the Norfolk assembled for a New Year's Eve dinner.

1998 United States embassy bombings

On 7 August, between 10:30 a.m. and 10:40 a.m. local time, suicide bombers in trucks laden with explosives parked outside the embassies in Dar es Salaam and Nairobi, and almost simultaneously detonated. 213 people were killed in the Nairobi blast, while 11 were killed in Dar es Salaam. An estimated 4,000 in Nairobi were wounded, and another 85 in Dar es Salaam. Seismological readings analysed after the bombs indicated energy of between 3–17 tons of high explosive material. Although the attacks were directed at American facilities, the vast majority of casualties were local citizens of the two African countries; 12 Americans were killed, including two Central Intelligence Agency employees in the Nairobi embassy,Associated Press, "Bin Laden raid avenged secret CIA deaths", The Japan Times, 30 May 2011, p. 1. and one U.S. Marine, Sergeant Jesse Aliganga, a Marine Security Guard at the Nairobi embassy.Jesse Nathanael Aliganga

The explosion damaged the embassy building and collapsed the neighbouring Ufundi Building where most victims were killed, mainly students and staff of a secretarial college housed there. The heat from the blast was channelled between the buildings towards Haile Selassie Avenue where a packed commuter bus was burned. Windows were shattered in a radius of nearly 1 kilometre.

Following the attacks, a group calling itself the "Liberation Army for Holy Sites" took credit for the bombings. American investigators believe the term was a cover used by Egyptian Islamic Jihad, who had actually perpetrated the bombing.Global Briefings, Issue 27, "Osama bin Laden tied to other Fundamentalists", September 1998. The attacks brought Osama bin Laden and Ayman al-Zawahiri—and their terrorist organization al-Qaeda—to the attention of the American public for the first time, and resulted in the Federal Bureau of Investigation (FBI) placing bin Laden on its ten most-wanted fugitives list.

2002 Kikambala Hotel bombing and Arkia Airlines missile attack, Mombasa

On 28 November 2002 two missiles were fired at, but missed, an Israeli passenger airliner as it took off from Mombasa airport. Subsequently, there was an attack on the Kikambala Hotel when it was receiving Israeli tourists.

The hotel blast occurred just after some 60 visitors had checked into the hotel, all of them from Israel, hotel officials said. 13 were killed and 80 injured. Ten Kenyans died, nine of whom were employed by the hotel, most of them were said to be traditional dancers who came to welcome the 140 guests arriving from Israel by state-chartered jet and three Israelis, two of whom were children. In an overnight operation that went on into the early hours, four Israeli military Hercules planes with teams of doctors and psychologists flew into Mombasa and evacuated injured Israeli tourists and all those who wanted to leave.Israel evacuates tourists from Kenya. BBC News (29 November 2002).

Almost simultaneously, two shoulder-launched Strela-2 (SA-7) surface-to-air missiles were fired at another chartered Boeing 757 airliner owned by Israel-based Arkia Airlines as it took off from Moi International Airport. The Arkia charter company had a regular weekly service flying tourists between Tel Aviv and Mombasa. Kenyan police discovered a missile launcher and two missile casings in the Changamwe area of Mombasa, about two kilometres (1.25 miles) from the airport.

Police sought MR Bajnaf Mselem Swaleh Mahdi Khamisi, who they believe may lead them to Fazul, the main suspect.

2012 al-Shabaab attacks

In October 2011, a coordinated operation between the Somali military and the Kenyan military began against the al-Shabaab group of jihadi insurgents in southern Somalia. The mission was officially led by the Somali army, with the Kenyan forces providing a support role. Since then, a series of explosions have rocked various areas in Kenya, bombings which are believed to have been retaliatory attacks by Al-Shabaab."huge-blasts" Al-Shabaab to retaliate in Kenya with "huge blasts" In early June 2012, Kenyan forces were formally integrated into AMISOM.

According to the US Embassy, in 2011 and 2012 there were at least 17 attacks involving grenades or explosive devices in Kenya, resulting in at least 48 deaths and around 200 people injured. Nine of the attacks occurred in North Eastern Province, including locations in Dadaab, Wajir, and Garissa. Four attacks occurred in Nairobi, and four in Mombasa. Targets included police stations and police vehicles, nightclubs and bars, churches, a religious gathering, a downtown building of small shops, and a bus station. One attack involved two simultaneous assaults on churches in Garissa on 1 July 2012. In this attack, 17 people were killed and around 50 people were injured.Travel Warning – Kenya : US Embassy . Nairobi.usembassy.gov.

2013 Westgate Mall shooting

On 21 September 2013, al-Shabaab associated gunmen targeted and shot customers at Nairobi's Westgate Shopping Mall. At least 67 people were killed in the attack.

2014 Mpeketoni attacks

Between 15 and 17 June 2014, more than 60 people were killed in attacks in and near Mpeketoni, Lamu County. Al-Shabaab claimed responsibility, but the Kenyan President Uhuru Kenyatta asserted that the attacks were organized by local politicians with ties to a network of gangs. Correspondents from the area suggested that the attacks may have been motivated by ethnic or religious hatred, or revenge for land grabbing.

On 15 June 2014, about 50 masked gunmen hijacked a van and raided a police station in the predominantly Christian town of Mpeketoni, as well as burning hotels, restaurants, and government offices. At least 53 people were reportedly killed during the attack, and eight others were unaccounted for as of 18 June. Most of the dead Kenyans were Kikuyus.

On 22 November 2014, 28 people on board a bus were executed in the Omar Jillo area of Mandera County in the north-eastern tip of Kenya. According to reports, the bus was hijacked by suspected members of the Islamist militant organisation al-Shabaab who identified and killed the non-Muslim passengers. Ten days later in the early hours of 2 December, news emerged of another brutal attack. This time, 36 people had been killed at a quarry in Koromei in the same county.

2015 Garissa attack

In April 2015, gunmen stormed the Garissa University College, killing almost 150 people and wounding several others. The attackers claimed to be from the Al-Shabaab militant group, and indicated that they were retaliating over non-Muslims occupying Muslim territory. The militants took several students hostage, freeing Muslims but withholding Christians. Over 500 students were still unaccounted for.

2019 Nairobi DusitD2 complex attack

On 15 January 2019, four gunmen attacked the DusitD2 complex at 14 Riverside Drive junction around 2:30 p.m. Before they were contained and brought down by the Kenya security forces, the terrorists killed 21 people and injured several others in the process.

2020 Camp Simba attack

On 5 January 2020, about 20 Al-Shabaab personnel attacked Camp Simba, the attack destroyed five aircraft and damaged one along with the destruction of two Oshkosh M-ATV and several fuel tankers. U.S. Army Specialist Henry Mayfield Jr was killed in the attack along with two other civilian contractors. After about an hour of fighting five Al-Shabaab soldiers were killed and five more arrested.

Lesser incidents 13 June 2010: During a "NO" campaign rally in Uhuru Park in Nairobi, a petrol bomb was thrown into the crowds as the meeting dispersed at dusk, sparking a stampede as people fled. Some witnesses reported that there were two separate explosions. Five people were killed and as many as 75 were injured. The meeting was called by a church leader to campaign against a proposed new constitution in a referendum.Pflanz, Mike. (13 June 2010) "Explosion at Kenyan referendum rally kills five". The Daily Telegraph. 17 September 2011: A grenade shell was recovered within the premises of the office of the Prime Minister. However, police cooled off the issue saying it was not targeting anybody."Raila evacuated but police claim nothing serious". The Standard, Kenya (21 September 2011).