The UN mission in Afghanistan says 21 civilians were killed in two separate airstrikes over the weekend.
It says in a statement Wednesday that nine civilians, mostly women and children, were killed in a Saturday airstrike in the northeastern Kapisa province, in an area where Afghan forces were battling the Taliban.
Another statement cited "preliminary findings" that 12 women and children from the same family were killed in a Sunday airstrike in the eastern Maidan Wardak province, also during an Afghan military operation.
The UN says it is unclear whether the airstrikes were carried out by Afghan or NATO forces. The Afghan government has not commented on the reports.