At least 15 people were killed after two Afghan air force helicopters collided in Nawa district of southern Helmand on Tuesday night, security sources said.
The incident happened after the helicopters had dropped commandos off and were carrying wounded security forces, the source said.
Another source said that eight people were killed in the incident.
The Ministry of Defense has not commented on the incident.
Omar Zwak, a spokesman for provincial governor, has confirmed there was an incident in Nawa district but has not provided details.
