Four policemen were killed and two others injured when their vehicle hit a roadside bomb in south-western Afghanistan, officials said Wednesday.

“The incident took place late on Tuesday in Char Borjak district, in which four policemen were killed and Mir Alam, the district police chief, and another policeman were wounded,” the office of the Governor of Nimroz province said in a statement.

Nobody has claimed responsibility, but the Taliban are usually blamed for attacks on Afghan and coalition forces.