MUSLIM GROUP: "THE MESMERIC PERFORMANCE BY THE #WESTGATE WARRIORS WAS UNDOUBTEDLY GRIPPING, BUT DESPAIR NOT FOLKS, THAT WAS JUST THE PREMIERE OF ACT 1"

From Atlas Shrugs:

CNN: On a Twitter account believed to be run by Al-Shabaab, the group promised more attacks to come. 

"The mesmeric performance by the #Westgate Warriors was undoubtedly gripping, but despair not folks, that was just the premiere of Act 1," according to a tweet posted Thursday. 

CNN could not confirm the authenticity of the tweet, but CNN terrorism analyst Paul Cruickshank said the account, which has also posted links to statements from Shabaab leader Mukhtar Abu Zubayr, appears to be legitimate, even if not "100% authenticated." 

Several Twitter accounts attributed to Al-Shabaab have been shut down in recent days, likely for violating the company's rules against promoting violence in tweets. 

While Kenyan Interior Minister Joseph Ole Lenku said Friday that eight suspects are being held for questioning in the attack, authorities are increasingly concerned that some of the attackers managed to escape alongside fleeing civilians in the aftermath of the initial attack, U.S. law enforcement officials told CNN. 

On Thursday, a Kenyan counterterrorism source told CNN that one of the suspects is an injured Kenyan who was being evacuated when a machine gun magazine fell out of his pocket, leading to suspicion he was among the automatic-weapon toting terrorists who roamed the mall killing civilians. He is being held in a military hospital, the source said.

READ: Source: Kenya mall attack suspect eyed after ammunition fell out of his pocket