At least six policemen were wounded in a mine blast close to a police outpost in Herat province on Tuesday night, local officials said on Wednesday.

The blast occurred around 10:30pm local time in Angel district after a mine placed close to the outpost exploded, said Abdul Ahad Walizada, a spokesman for the provincial police chief.

He said four policemen were wounded and have been taken to the hospital for treatment.

But Mohamad Rafiq Sherzai, a spokesman for the local public health department, said that six policemen were wounded in the blast and were taken to the hospital.

All wounded policemen are in stable condition, he said.

The residents in the area said fighting was also heard after the blast.

No group including the Taliban has claimed responsibility.