Gunmen from the Somali Islamist group Al-Shabab attacked a shopping centre in Nairobi taking hundreds hostage. The group claimed it was in retaliation for Kenyan military action against them in southern Somalia. The siege lasted four days in September 2013 and more than 60 people were killed, but hundreds more were injured and traumatised. Daniel Ouma was a paramedic on duty at the scene and explains to Rebecca Kesby how his team tried to help people affected.

PHOTO: A police officer during a rescue operation at the site of the terrorist attack, Westgate Mall, on September 21, 2013 in Nairobi, Kenya. Gunmen from the extremist group Al-Shabab entered the mall and opened fire at random on shoppers; 68 deaths have been confirmed. (Photo by Jeff Angote/Nation Media/Gallo Images/Getty Images)