Bomb just misses Kenyan policeman in refugee camp

Albert Kimathi says no one was injured in Tuesday's blast in Dadaab refugee camp. It is the second explosion there in as many days and the fifth bomb to be planted in Dadaab in two months. Three police officers in Dadaab have been killed.

The attacks have severely curtailed the movements of aid workers, meaning many refugees cannot access important services.

Aid workers rely on Kenyan police for escorts after Somali gunmen kidnapped a Kenyan and two Spanish aid workers from Dadaab.

Kenya has had more than a dozen bomb and grenade attacks since sending troops across the Somali border in October.