A US airstrike killed 10 Afghan soldiers on Monday at an army checkpoint in a Taliban-infested province, officials said. It is the latest "friendly fire" incident involving foreign coalition forces.

The early morning raid in Baraki Barak district of Logar province comes as coalition forces increase airstrikes on potential militant targets despite the drawdown of NATO forces after 13 years of war.

A similar NATO airstrike in the area in December killed five civilians and wounded six others.