According to ABC news, they said Muslims could leave before they started shooting.
They claim to be associated with Al-Qaeda.
It's religious ignorance. Nothing in the Qu'ran backs this sort of barbarity:
Masked gunmen stormed a packed upmarket shopping mall in Nairobi, killing 39 people and wounding 150 more in a massacre claimed by Somalia's Al Qaeda-linked Shebab rebels.
Source Link (Agence France-Presse): http://news.yahoo.com/somalias-sheba...182747786.html
Of course Kenyan officials have a different view...
How does one fight such subhuman hate?"They want to cause fear and despondency in our country, but we will not be cowed," Kenyatta said, adding: "Terrorism is a philosophy of cowards."
Kenyan police described the attackers as a well-organised "terror gang" numbering around 10.