The Somalia-based Islamic group al-Shabab has claimed responsibility for the Nairobi shopping mall attack that began Saturday and has left at least 62 dead, saying that the assault is in retaliation for Kenyan military operations in Somalia.
MORE: http://www.pewresearch.org/fact-tank/2013/09/24/nairobi-mall-terrorist-attack-is-part-of-kenyas-sharp-rise-in-religious-hostilities/
See also...
Gunmen Kill Dozens in Terror Attack at Kenyan Mall
http://www.nytimes.com/2013/09/22/world/africa/nairobi-mall-shooting.html?pagewanted=all&_r=0