A suicide car bomb attack in southern Afghanistan has killed three police officers and wounded four other people.
Police said a car bomb exploded in the town of Spin Boldak, near the border with Pakistan in Kandahar Province, when police were busy checking vehicles.
Three police officers and one civilian were among the wounded.
Nobody has claimed responsibility for the attack.
Provincial government spokesman Zalmai Ayubi said the checkpoint had been set up because of an intelligence warning that an attack was imminent.
compiled from agency reports