Onlookers are teargassed by police trying to disperse idlers who had milled around a prestigious shopping mall on September 24, 2013 in Nairobi, which is the scene of a siege by Somali islamists now on its fourth day. Security forces are defusing explosive devices set up by the jihadists inside the still ongoing shopping mall siege, where extremists claim to be still holding hostages, police said on Septenber 24. Sporadic gunfire broke out again at dawn, hours after Kenyan forces had claimed to have wrested back control of the building from the fundamentalists who are said to include American nationals and a Brtitish woman. AFP PHOTO/TONY KARUMBA