KANDAHAR, Afghanistan (Reuters) - Dozens of people were killed and injured in an attack by government forces in the southern Afghan province of Helmand overnight, a government official said on Tuesday, as a wedding ceremony near the target was said to be the headquarters of the Taliban.

Al-Jazeera correspondent quoted a government official that 35 civilians were killed and 15 wounded in the raid carried out by government forces in the Directorate of "Musa Qala" in Helmand province, but Reuters quoted other officials that the number of wounded is 13, while one said the death toll reached forty, They are all civilians.

The sources said that Afghan forces were targeting a house used by the Taliban to train "suicide bombers", but the bombing hit a wedding near the house.

On Thursday, 30 farmers were killed and 40 wounded in an air strike by Afghan security forces with US air support in the eastern province of Nangarhar, where the aim was to destroy a hideout used by Islamic State militants, but the shelling mistakenly hit farmers in the fields, a government source said.

On the same day, the governor of the southern province of Zabul announced that 10 people were killed and 90 wounded in a car bomb attack on the intelligence building and destroyed a hospital nearby. The Taliban claimed the attack as a "martyrdom operation against the intelligence administration."

The movement has vowed to target schools that use polling stations, and claimed responsibility Tuesday for two attacks, one targeting an election rally of Afghan President Ashraf Ghani in Parwan province (north of the capital Kabul), while the second attack targeted the headquarters of the Afghan army in the capital.