Four Afghan police officers have been killed and two more officers injured in a roadside bomb blast in south-western Nimruz province, local officials said Wednesday.
The incident took place Tuesday in Zarang, the capital of the province, when a police vehicle struck an improvised explosive device (IED) in the road, police said.
The police were travelling from Zarang to the Charbarak district in the province.
No group including the Taliban has claimed responsibility for the blast.
Nimruz province, which shares a border with Iran, has an active insurgency which frequently use IEDs to strike the local security forces and government personnel.