KABUL, Afghanistan -- Afghan police say two gunmen wearing suicide bomb vests have attacked the home of an intelligence official in the southwest, setting off a gunbattle in which a guard and the two assailants were killed.

The police chief of Farah province, Gen. Mohammad Faqir Ahkir, says the intelligence chief was not home at the time.

He says guards were suspicious of the attackers and fired on them, sparking a 15-minute gunbattle. A bullet detonated the explosives vest of one of the two attackers, killing them both and damaging several homes.

One guard was also killed and two others were wounded in Tuesday night's attack in Farah city, which has not been a hotbed of violence.