Armed Somali group al-Shabab has claimed responsibility for the attack and ongoing siege of an upscale shopping mall in the Kenyan capital of Nairobi that has left at least 39 people dead and 50 injured.

Kenyan security forces have arrested one of the gunmen who attacked the mall on Saturday, the Kenyan presidency said on Twitter.

The attack began at about 12:00 local time (09:00 GMT), when around 10 people entered the Westgate centre throwing grenades and firing automatic weapons.

Footage from inside the mall shows the aftermath of the shootout.

Source: Al Jazeera