Unidentified gunmen began a three-day attack on the upmarket Westgate shopping mall in Nairobi, Kenya, resulting in the deaths of 67 people with at least another 175 wounded.

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.

Westgate Shopping Mall is an upscale shopping mall located in the Westlands division of Nairobi, Kenya. It was first opened in 2007.

Nairobi is the capital and largest city of Kenya. The city lies in the south-central part of Kenya, at an elevation of 1,795 metres (5,889 ft). The name is derived from the Maasai phrase Enkare Nyrobi, which translates to 'place of cool waters', a reference to the Nairobi River which flows through the city. The city proper had a population of 4,397,073 in the 2019 census.