An Afghan official says government forces have regained control of a strategic district in southern Helmand province that the Taliban had seized.

Omar Zwak, a spokesman for the governor of Helmand province, said Sunday that Afghan forces launched an operation on Friday to retake the district of Musa Qala. Zwak says the fighting killed six soldiers and wounded 14.

Taliban insurgents overran Musa Qala on Wednesday after a week of attacks targeting security forces there.

NATO said it conducted at least 13 airstrikes on Taliban positions in the district last week to aid Afghan forces.

Helmand, the source of most of the heroin produced in Afghanistan, is the Taliban heartland and the scene of heavy fighting since the warm weather fighting season began in April.