"US was warned about Kenya mall attack" 

MSNBC

U.S. intelligence received reports of a serious threat in Kenya before last week’s terrorist attack at a Nairobi mall that left 62 dead and more than 150 injured, NBC News reported. 

Officials said that NSA reviewed intelligence of a “credible” threat. 

Kenyan police arrested nine suspects tied to the attack. Al Shabaab, a Somali terror group tied to al Qaeda, hadclaimed credit for the attack.