• A police officer tries to secure an area inside the Westgate Shopping Centre in Nairobi, Kenya, where gunmen went on a shooting spree on Saturday. Picture: REUTERS

  • Security officers secure an area inside Westgate Shopping Centre in Nairobi on Saturday. Picture: REUTERS

  • Civilians escape an area at the Westgate Shopping Centre on Saturday. Picture: REUTERS

  • KEEPING SAFE: A police officer and photographers take cover after hearing gunshots near the Westgate shopping centre in Nairobi on Monday. Picture: REUTERS

  • A man reads a daily newspaper with other onlookers at the edge of a security perimeter put into place near the Westgate shopping centre, in Nairobi, Kenya, where gunmen were holding hostages on Sunday. Picture: REUTERS

  • TEMPERATURE RISING: Smoke rises after an explosion at Westgate Shopping Centre in Nairobi on Monday. Security officials said they caused the blast at the besieged mall. Picture: REUTERS

  • REINFORCEMENTS: A Kenyan soldier holds his gun as he arrives at the Westgate mall in the capital, Nairobi, on Sunday. Picture: REUTERS

  • UNDER SIEGE: Soldiers from the Kenya Defence Forces enter the Westgate Shopping Centre in the capital Nairobi on Monday, where scores of people were killed at the weekend in a siege by a Somali Islamist group. Picture: REUTERS

  • People take cover following a string of explosions from Westgate Shopping Centre in Nairobi during the third day of a stand-off between Kenyan security forces and gunmen inside the building on Monday. Picture: REUTERS

  • A man donates blood to the injured victims of the attack on a shopping mall at a temporary donation centre at Uhuru Park grounds on Monday. Picture: REUTERS

  • Armed police search through Westgate shopping centre for gunmen on Saturday. Picture: REUTERS

  • Women carrying children run for safety as armed police hunt gunmen who went on a shooting spree in Westgate shopping centre on Saturday. Picture: REUTERS

  • Smoke rises over Westgate Shopping Centre after an explosion in Nairobi, Kenya, on Monday. Picture: REUTERS

  • A security officer gestures as 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 on Monday. Picture: REUTERS

  • ON THE SCENE: A police officer tries to secure an area inside the Westgate mall, Nairobi, where gunmen went on a shooting spree on Saturday. Picture: REUTERS

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Images from the massacre at Nairobi's Westgate mall, which is under siege by Al-Shabaab militants.