Updated

A Somali police official says three police officers and one civilian have been killed in a car bombing outside a police academy in the Somali capital.

Gen. Ali Hersi Barre said Wednesday that a suicide car bomber detonated an explosives-laden vehicle outside a cafe near the academy.

There was no claim of responsibility for the blast, but it bore the hallmarks of the Islamic extremist group al-Shabab.

The attack comes after a U.S. airstrike on a training camp killed more than 150 al-Shabab members on Saturday.

Despite being ousted Mogadishu and surrounding regions, al-Shabab continues to launch guerrilla attacks across the Horn of Africa country.