Smoke rises over Westgate Shopping Centre after an explosion in Nairobi (Photo:

Smoke rises following a string of explosions during the third day of a stand-off between Kenyan secu

Smoke rises over Westgate Shopping Centre after an explosion in Nairobi (Photo: Reuters)

Smoke rises over Westgate shopping centre after an explosion in Nairobi (Photo: Reuters)

Bystanders make calls as heavy smoke rises from the Westgate Mall in Nairobi (Photo: AP)

A plume of black smoke billows over the Westgate Mall (Photo: AP)

A soldier holds a RPG near the Westgate shopping mall as smoke rises from it (Photo: AP)