4 Kenyan police killed in border county

The east African nation, which sent its troops into Somalia in late 2011, has suffered a string of gun and grenade attacks claimed by al Shabaab group as retaliation.

"Four administration police officers were killed during the attack and we are now preparing to transport their bodies from the scene," Garissa County Commissioner Rashid Khattor said.

"Our initial assessment points to the attackers being al Shabaab militants who crossed over the border and carried out the hit and run attack," he said.

A local teacher was also injured in the attack at Galmagalla late on Friday, Khattor said.

The attacks have damaged Kenya