Westgate mall attack in 60 seconds

At least 67 people died when suspected militants attacked the Westgate mall in Kenya's capital, Nairobi, in September 2013.

The attack sparked a four-day siege in which large parts of the shopping centre were destroyed. The Somali militant group al-Shabab said its members staged the attack in response to Kenya's army carrying out operations on Somali territory.

BBC News explains the background to the attack, and its fallout, in 60 seconds.

Produced by Baya Cat and Darin Graham