Updated: September 24, 2013, 12:00 AM
In pictures: Hostages still inside Nairobi mall on fourth day of siege
While the government announced Sunday that "most" hostages had been released, a security expert with contacts inside the mall said at least 10 were still being held by a band of attackers described as "a multinational collection from all over the world." Sayyid Azim / AP Photo
Kenyan soldiers enter the Westgate Mall through the main entrance. Despite Kenyan government assurances of success, an explosion and gunfire could be heard coming from the mall at around 6.30am, followed by the sustained chatter of automatic weapons for about a minute almost three hours later, according to Associated Press reporters at the scene. Ben Curtis / AP Photo
A security expert says there were at least 30 hostages when the assault by Al Shabab began Saturday, and said it's clear that Kenyan security officials haven't cleared the building fully. Siegfried Modola / Reuters
At least 62 people were killed in the assault Saturday by some 12 to 15 militants wielding grenades and firing on civilians inside the mall. Jerome Delay / AP Photo
A Kenya Defence Forces (KDF) armoured military vehicle drives to the Westgate shopping centre after an exchange of gunfire inside the mall in Nairobi. Thomas Mukoya / Reuters