Westgate shopping mall attack

On 21 September 2013, four masked gunmen attacked the Westgate shopping mall, an upmarket mall in Nairobi, Kenya. There are conflicting reports about the number killed in the attack, since part of the mall collapsed due to a fire that started during the siege. The attack resulted in 71 total deaths, including 62 civilians, five Kenyan soldiers, and all four gunmen. Approximately 200 people were wounded in the massacre.

The militant Islamist group al-Shabaab claimed responsibility for the incident, which it characterised as retribution for the Kenyan military's deployment in the group's home country of Somalia following Operation Linda Nchi from 2011 to 2012.

Kenyan authorities arrested dozens of people in the aftermath of the attack, but had not announced any suspects directly related to the siege. On 4 November 2013, a Kenyan court charged four Somali nationals with harbouring the gunmen in their homes, with each pleading not guilty.

On 20 September 2015, Foreign Policy magazine reported the Westgate attack on 21 September lasted several hours, with the last victim killed before special Kenyan security forces entered the mall. The mall was officially declared secured on 24 September.