A suicide bomber killed three Afghan police officers and two civilians and wounded four others in the southern province of Kandahar on Saturday, Reuters quoted a senior police official as saying. The suicide bomber was on foot when he detonated the device on the outskirts of Kandahar City near a highway connecting Kandahar to western Afghanistan, about 400 km (250 miles) southwest of the capital Kabul. The policemen were driving in a military vehicle on the highway when the suicide bomber struck, the police official said. It was not immediately clear whether the bomber was among the victims.