A DORSET-trained soldier was among three British forces personnel killed by a man wearing a police uniform in Afghanistan.

The Ministry of Defence said three British soldiers were killed at a checkpoint by a man wearing an Afghan police uniform.

The men, members of an Afghan Police Advisory Team, were leaving a shura – or meeting of elders – at Checkpoint Kamparack Pul in Nahr-e-Saraj, Helmand Province, when they were shot on Sunday.

Two of the men were serving with the 1st Battalion Welsh Guards and the other was serving with the Royal Corps of Signals who would have completed his specialist signalling training at Blandford Camp.

The soldiers’ next of kin have been informed.

An investigation into the incident, the latest so-called ‘green on blue’ attack in which members of the Afghan security or police forces have opened fire on international allies, has been launched. Four other British soldiers have died in similar circumstances so far this year.