An insurgent rocket attack on a US air base in Afghanistan has damaged the plane of America’s top military officer.

Gen Martin Dempsey, chairman of the US Joint Chiefs of Staff had arrved in the country following a spate of ‘green on blue’ kiilings.

He was not near the plane at the time.

However, two US maintenance crew were slightly injured.

The attack happened late on Monday night at the US air base in Bagram.

Gen Dempsey had arrived on Monday in a C-17 transport aircraft which was parked at Bagram.

Gen Martin Dempsey, chairman of the US Joint Chiefs of Staff, had met Nato commanders and officials for talks after the death of a Nato soldier on Sunday who was shot dead by an Afghan in a police uniform.

The soldier was the 10th US soldier to die in this way in two weeks.

Two American soldiers were killed in another incident on Friday.

And six were killed in a single day on 10 August.

Some 130,000 (“blue”) Nato troops are fighting insurgents in Afghanistan, alongside 350,000 (“green”) Afghans.

So far, 40 members of the  International Security Assistance Force (Isaf) personnel – most of the victims Americans – have been killed by members of the Afghan security forces this year.

There were 35 such deaths in all of 2011

A statement from Nato’s Isaf force said shrapnel from “an indirect fire round” had damaged the plane as well as a Nato helicopter.

The general was in his room at the time of the attack, according to officials.