Alshabaab suicide bomber who disguised himself as traffic offender killed five including police officers.
Officials said the man who was detained by police officers and brought to the traffic head quarters in Shangani district later detonated his car full of explosives.
Officials confirmed five deaths and ten injuries so far.
Another suicide car bomber who wanted to drive his explosive inside the head quarters was shot dead by the police before he detonated.
Armed group Alshabaab claimed the responsibility saying they killed senior police officers in the attack.
