NATO officials said two coalition members were killed in a helicopter crash in eastern Afghanistan Monday.
The coalition said it is investigating the cause of the crash. Initial reports said there was no enemy activity in the area.
Also Monday, an insurgent attack in southern Afghanistan killed a NATO service member.
NATO did not release the names or nationalities of the victims.
On Sunday, Afghan President Hamid Karzai condemned a coalition airstrike that officials say killed a family of eight in eastern Paktia province, where Afghan and international troops are trying to quell the Taliban insurgency.
A provincial government spokesman Rohullah Samoon told VOA Sunday the overnight airstrike killed a man, his wife and six children in the Gerda Serai district. He said that according to his information, the man was not linked to any insurgent group or any anti-government activities.