This screen grab released on October 18, 2013 and taken from closed circuit television shows an armed man identified as Hassan Abdi Dhuhulow by the BBC, an information not confirmed by Norway's PST intelligence agency, during the attack at the Westgate mall in Nairobi on September 21, 2013. At least 67 people were killed in the four-day siege and the Kenyan Red Cross lists 23 people as missing. [Photo: chinanews.com]

 This screen grab released on Ocotber 18, 2013 and taken from closed circuit television shows an armed man (L) during the attack at the Westgate mall in Nairobi on September 21, 2013. At least 67 people were killed in the four-day siege and the Kenyan Red Cross lists 23 people as missing. [Photo: chinanews.com]

 This screen grab released on Ocotber 18, 2013 and taken from closed circuit television shows an armed man walking during the attack at the Westgate mall in Nairobi on September 21, 2013. At least 67 people were killed in the four-day siege and the Kenyan Red Cross lists 23 people as missing. [Photo: chinanews.com]

 This screen grab released on Ocotber 18, 2013 and taken from closed circuit television shows people lying on the ground during the attack at the Westgate mall in Nairobi on September 21, 2013. At least 67 people were killed in the four-day siege and the Kenyan Red Cross lists 23 people as missing. [Photo: chinanews.com]

 This screen grab released on Ocotber 18, 2013 and taken from closed circuit television shows people during the attack at the Westgate mall in Nairobi on September 21, 2013. At least 67 people were killed in the four-day siege and the Kenyan Red Cross lists 23 people as missing. [Photo: chinanews.com]