Two US soldiers have been shot dead by a local policeman in Afghanistan, officials for the international Nato-led force in the country say.

The policeman, reportedly a member of a local defence force being trained by international troops, was also shot and killed, officials said.

The incident happened in the western province of Farah.

It is the latest in a series of so-called “green on blue” attacks by members of the Afghan security forces.

“Two US Forces-Afghanistan service members died this morning as a result of an insider threat attack in Farah province,” the US-led International Security Assistance Force was quoted by Agence-France Presse news agency as saying.

“A member of the Afghan local police turned his weapon against two USFOR-A service members. The attacker was shot and killed.”. . .