But according to a Kenyan intelligence official, the small
The information — revealed Friday to CNN by the source, who is close to the investigation into the attack — suggests the Somalian terror organization had been planning the operation at least that long.
How the team of terrorists got their weapons and explosives into the mall without notice is a central part of the investigation into the attack, which left at least 67 people dead and parts of the upscale mall in ruins.
The Kenya Red Cross said Friday that 61 people remain unaccounted for. Some could be buried in the rubble of the partially collapsed mall.
At least five of the terrorists also died before Kenyan forces were finally able to bring the siege to an end on Tuesday. The terrorists stormed the building Saturday.
Read: Mall attack timeline.
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