A comedian looks on as a policeman prepares to fire a tear-gas canister to disperse residents gathered outside the Westgate shopping centre in Nairobi
A comedian looks on as a policeman prepares to fire a tear-gas canister to disperse residents gathered outside the Westgate shopping centre in Nairobi September 23, 2013. Thick smoke poured from the besieged Nairobi mall where Kenyan officials said their forces were closing in on Islamists holding hostages on Monday, three days after a raid by Somalia's al Shabaab killed at least 62 people. It remained unclear how many gunmen and hostages were still cornered in the Westgate shopping centre, two hours after a series of loud explosions and gunfire were followed by a plume of black smoke, that grew in volume from one part of the complex. REUTERS/Thomas Mukoya (KENYA - Tags: CIVIL UNREST POLITICS TPX IMAGES OF THE DAY)
A comedian looks on as a policeman prepares to fire a tear-gas canister to disperse residents gathered outside the Westgate shopping centre in Nairobi
A comedian looks on as a policeman prepares to fire a tear-gas canister to disperse residents gathered outside the Westgate shopping centre in Nairobi September 23, 2013. Thick smoke poured from the besieged Nairobi mall where Kenyan officials said their forces were closing in on Islamists holding hostages on Monday, three days after a raid by Somalia's al Shabaab killed at least 62 people. It remained unclear how many gunmen and hostages were still cornered in the Westgate shopping centre, two hours after a series of loud explosions and gunfire were followed by a plume of black smoke, that grew in volume from one part of the complex. REUTERS/Thomas Mukoya (KENYA - Tags: CIVIL UNREST POLITICS)
A KDF armoured military vehicle drives from the Westgate shopping centre after an exchange of gunfire inside the mall in Nairobi
A Kenya Defence Forces (KDF) armoured military vehicle drives from the Westgate shopping centre after an exchange of gunfire inside the mall in Nairobi September 23, 2013. Thick smoke poured from the besieged Nairobi mall where Kenyan officials said their forces were closing in on Islamists holding hostages on Monday, three days after a raid by Somalia's al Shabaab killed at least 62 people. It remained unclear how many gunmen and hostages were still cornered in the Westgate shopping centre, two hours after a series of loud explosions and gunfire were followed by a plume of black smoke, that grew in volume from one part of the complex. REUTERS/Thomas Mukoya (KENYA - Tags: CIVIL UNREST POLITICS)
A Kenya police helicopter patrols over buildings surrounding the Westgate shopping centre during an exchange of gunfire inside the mall in Nairobi
A Kenya police helicopter patrols over buildings surrounding the Westgate shopping centre during an exchange of gunfire inside the mall in Nairobi September 23, 2013. Thick smoke poured from the besieged Nairobi mall where Kenyan officials said their forces were closing in on Islamists holding hostages on Monday, three days after a raid by Somalia's al Shabaab killed at least 62 people. It remained unclear how many gunmen and hostages were still cornered in the Westgate shopping centre, two hours after a series of loud explosions and gunfire were followed by a plume of black smoke, that grew in volume from one part of the complex. REUTERS/Thomas Mukoya (KENYA - Tags: CIVIL UNREST POLITICS)
Smoke rises from Westgate shopping centre in Nairobi following a string of explosions during the third day of a stand-off between Kenyan security forces and gunmen inside the building
Smoke rises from Westgate shopping centre in Nairobi following a string of explosions during the third day of a stand-off between Kenyan security forces and gunmen inside the building September 23, 2013. Powerful explosions sent thick smoke billowing from the Nairobi mall where militants from Somalia's al Qaeda-linked al Shabaab group threatened to kill hostages on the third day of a raid in which at least 59 have already died. REUTERS/Thomas Mukoya (KENYA - Tags: CIVIL UNREST CRIME LAW)
Residents run away as policemen fired tear gas to disperse them, after an explosion at the Westgate shopping centre in Nairobi
Residents run away as policemen fired tear gas to disperse them, after an explosion at the Westgate shopping centre in Nairobi, September 23, 2013. Powerful explosions sent thick smoke billowing from the Nairobi mall where militants from Somalia's al Qaeda-linked al Shabaab group threatened to kill hostages on the third day of a raid in which at least 59 have already died. REUTERS/Thomas Mukoya (KENYA - Tags: CIVIL UNREST CRIME LAW)
Smoke rises over Westgate shopping centre after an explosion in Nairobi
Smoke rises over Westgate shopping centre after an explosion in Nairobi, September 23, 2013. Powerful explosions sent thick smoke billowing from the Nairobi mall where militants from Somalia's al Qaeda-linked al Shabaab group threatened to kill hostages on the third day of a raid in which at least 59 have already died. REUTERS/Thomas Mukoya (KENYA - Tags: CIVIL UNREST CRIME LAW)
Blasts shake Nairobi mall, smoke pours from building
A spokesman for al Shabaab, which has demanded Kenya pull its troops out of neighbouring Somalia, warned they would kill hostages if Kenyan security forces, who are being assisted by Western and Israeli experts, tried to storm their positions
Police officers stand guard near the ongoing military operation at Westgate Shopping Centre in Nairobi
Kenyan police officers stand guard near the ongoing military operation at Westgate Shopping Centre in the capital Nairobi, September 23, 2013. Gunfire and explosions sounded on Monday from the Nairobi mall where militants from Somalia's al Qaeda-linked al Shabaab group threatened to kill hostages on the third day of a raid in which at least 68 have already died. REUTERS/Thomas Mukoya (KENYA - Tags: CIVIL UNREST CRIME LAW)