One among the deceased has been identified as Safar Mohammad Bidar, the head of police in Qaramqul district.

They were killed while on their way to help other security force members who had faced an attack from Taliban insurgents.

No group has claimed the attack so far.

In a separate incident, on Monday, at least three policemen were injured in a bomb blast in Qaisar district of the province.

In the last few weeks, Taliban attacks have intensified in Afghanistan, according to police.