KANDAHAR (AFP) - Nine civilians including six children were killed in a NATO air strike targeting a Taliban position in restive southern Afghanistan, the provincial governors office said Thursday. The strike took place after a joint Afghan and NATO forces convoy came under direct fire in a village of Nad Ali district of Helmand province, Daud Ahmadi, spokesman for the provincial governor, told AFP. Six children and three women were killed and another three civilian men were wounded, he said. The wounded were taken to a NATO hospital for treatment, the spokesman said. Four armed Taliban were also killed in the air attack, he added. NATOs International Security Assistance Force (ISAF) said the air strike followed extensive engagement with insurgents fighting from a compound in the troubled south. The alliance confirmed reports of civilian casualties but gave no specific death toll. ISAF received reports of a number of persons killed in the compound, including women and children, it said in a statement. ISAF and village elders are investigating, the multi-national force said. Ahmadi said after the convoy was attacked NATO dropped a bomb next to a house in the village. Ehsanullah, an elder from Khoshal village, where the strike took place, earlier told AFP that Haji Kot Akas house was hit late Wednesday. They had four guests at home when the bombing took place. The bomb killed Aka, his wife, four children and three of the guests. One of the guests was wounded, he said. Civilian casualties are a sensitive issue in Afghanistan, creating a rift between President Hamid Karzais government and international forces as well as resentment on the ground against foreign troops.