Updated

An Afghan official says Taliban have killed at least four policemen when they stormed a security checkpoint in northern Sari Pul province.

Mohammad Noor Rahmani, head of the provincial council, said five others were wounded in Saturday's attack on the outskirts of the province's capital city.

Police in eastern Ghazni province say Taliban also launched attacks on security checkpoints there on Saturday, killing three personnel and wounding seven others.

A spokesman for the provincial police chief, Ahmad Khan Serat, said police killed seven insurgents during the gun battle.

Taliban claimed responsibility for the attack in Ghazni, but made no statement on Sari Pul.