At least eight policemen were killed in an insider attack on the Kabul-Kandahar highway close to the capital of Zabul province, a security source told TOLOnews on Thursday.
The incident happened on Wednesday night after a policeman invited two guests to visit the check post where he was stationed.
Together, the three allegedly opened fire on the police members present. They then fled in a police Ranger, said the source.
The source said that police have started investigations into the attack.
However, no group including the Taliban has claimed responsibility for the incident.
This comes after the Ministry of Defense on Wednesday raised concerns over the infiltration of the enemy into the ranks of security forces. The ministry said however it has a new strategy that will be implemented in the near future to counter this problem.
At a recent National Security Council (NSC) meeting, President Ashraf Ghani ordered the immediate implementation of the strategy to fight this threat.