London Guardian 
May 13, 2012
Two British servicemen have been shot dead by members of the Afghan police force, prompting renewed fears over the possible infiltration of the country’s security forces by insurgents.
The Ministry of Defence said that a Royal Air Force airman and a soldier from 1st Battalion Welsh Guards were killed on Saturday in the Lashkar Gah district of Helmand province.
They were providing security for a meeting with local officials at a patrol base. Next of kin have been informed.
An International Security Assistance Force (ISAF) spokesman said the attack was conducted by two people wearing Afghan police uniforms. One is on the run and the other was killed when forces returned fire, he said.