At least three policemen have been killed after a suicide bomber detonated an explosives-laden vehicle near a police training base in southern Afghanistan.
Omar Zwak, spokesman for the governor of Helmand Province, said 10 others were wounded in the attack on May 14.
Zwak said the attack targeted a training center for police in the Nad Ali district.
Taliban spokesman Qari Yusouf Ahmadi claimed responsibility for the attack.
Militants have attacked Helmand, a Taliban heartland and the biggest source of Afghanistan's opium, for months.
Government forces have recently pulled out of several districts to regroup around the provincial capital, Lashkargah.
Hundreds of American troops were sent to Helmand this year to bolster its defense with a beefed up training and advisory mission.
Afghan forces have promised to launch an offensive that has yet to materialize.