A local witness and the US mission in Afghanistan said a joint US-Afghan military convoy has fired flares at several civilian vehicles, causing the cars to catch fire and injuries.
The US forces statement on Saturday said that the US troops released flares as a deterrent after making several attempts to wave the drivers off the road, but didn't aim at the vehicles.
It said the US forces were trying to stop the vehicles from approaching the military convoy in eastern Laghman province Friday night, the Associated Press reported.
Imad Dawran, a witness to the incident, said he was waiting for the convoy to pass, but suddenly he received flare shots that caused him minor injuries and hit his car.
He said he also saw at least two other vehicles on fire on the road.