New security camera footage has emerged from the attack on the Westgate shopping centre in Nairobi last month showing shoppers scrambling for cover as bullets fly through the air.

At least 71 people were killed in the four-day seige in the Kenyan capital which began on September 21, and for which which Somalia-based group al-Shabab claimed responsibilty.

The CCTV footage taken during the attack gives an insight into the behaviour of the attackers. The images shows the sheer terror people had to endure and the brutality of the attack.

The footage shows the attackers walking through a supermarket, heavily armed and on the phone. They are often seen walking calmly through the corridors.

At one point, the videos shows a woman, who seemed to be limping, with small children, followed by what appears to be an injured young girl and, behind them, one of the attackers waving them on to keep walking.

The footage, which was obtained by Reuters news agency, shows only four attackes.