The provincial police spokesman Amanuddin Aman said the policemen were serving with the ALP forces in Kohistanat district.
Aman further added that the defected ALP forces had connections with the Taliban group in the past and had assisted them to infiltrate in Kohistan district.
He said sporadic gun battle continues between the remaining ALP forces and the Taliban militants in the area.
Aman also added that additional forces have been deployed in the area to repress the assailant Taliban militants and clear the district from their presence.
The Taliban group spokesman Zabiullah Mujahid claimed around 100 ALP forces have joined the Taliban militants in Kohistanat district.
Sar-e-Pul is among the relatively volatile provinces in northern afghanistan where anti-government armed militant groups have recently increased their insurgency activities in a number of its districts.
This comes as over 100 members of the Afghan natioanl security forces surrendered to Taliban group in Wardoj district following days of heavy gun battle.