Afghan officials say a police officer loyal to the Taliban helped a group of Taliban fighters sneak into a remote police post and kill at least three other police officers.
The Taliban raid happened before dawn on December 27 in Tarin Kot, the capital of the Uruzgan Province.
Police spokesman Farid Ahmad Aiel said the Taliban sympathizer called the militants while the other officers were sleeping and told them to carry out the attack.
He later fled with the attackers.
Abdullah Hemat, a spokesman for Uruzgan's provincial administration, confirmed the incident and also blamed a Taliban infiltrator.
Insider attacks by Afghan police and soldiers have become a major concern as Kabul hires many new recruits to bolster its security forces ahead of NATO's planned withdrawal by the end of 2014.
Based on reporting by dpa and AFP