The Kenyan military also named four men believed to have carried out the attack.
The men were named as Abu Baara al-Sudani, Omar Nabhan, Khattab al-Kene and Umayr.
Kenya initially said that between 10 and 15 gunmen were involved in the 80-hour siege of a busy upmarket shopping centre that killed at least 67 people.
"From what we have now that is coming out of the investigation, the number of attackers was between four to six," police chief David Kimaiyo told Kenyan television station KTN.
"None of them managed to escape from the building after the attack," he said, implying that they were killed in the confrontation.
Witnesses described how the fighters stormed the complex midday on September 21, when it was crowded with Saturday shoppers, firing from the hip and hurling grenades.
Newly released CCTV camera footage from one part of the mall shows four armed men walking calmly around, apparently searching for new victims.
On Saturday Kimaiyo confirmed that wanted British "White Widow" Samantha Lewthwaite -- reported to have been one of the attackers -- was not involved.
"On Samantha we have also established that she was not part of the attackers in the building. There was no woman," he said.
Ruthless
Kenyan officials claimed to have killed five assailants, but the footage, taken around five hours into the 80-hour siege, shows only four men.
One thing is clear: the men were organised, apparently unafraid, and utterly ruthless.
The security camera footage shows them in the bread section of the supermarket hours after the siege began, the bulk of their victims most likely already dead.
They wear backpacks, perhaps stuffed with the ammunition that they would use to keep Kenya's army -- backed by foreign special forces -- at bay for four days.
In one shot, one of the attackers approaches supermarket checkout tills, knocking over computer screens.
At the same time, he is seen chatting on a mobile phone, suggesting either coordination with attackers inside the mall or even to commanders outside or in Somalia.
Meanwhile foreign special forces staged a nighttime sea and air attack on a key Shebab base in southern Somalia, apparently targeting a senior Islamist commander. The Shebab said they fought off the assault.
source :africareview.com
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