At least 20 police officers were killed when militants ambushed checkpoints in Afghanistan's volatile southern Helmand province, an Afghan official said.
Mohammad Ismail Hotak, the head of the province's joint co-ordination of police and military operations, said the attacks late last night hit checkpoints in Musa Qala district, long a Taliban stronghold.
He said 10 other police officers were injured and that the Taliban also seemed to have suffered high casualties.
He added that the battle is continuing and reinforcements have been sent from other districts.
The Taliban claimed responsibility for the attacks.
Taliban militants have been targeting vulnerable police checkpoints across the country since launching their summer offensive in April.
Last month, a Taliban attack in Helmand's Naw Zad district killed at least 19 police officers.