Turkish air-strikes have killed at least 30 Kurdish villagers in the southeast of the country according to local officials.
Warplanes may have mistaken them for rebels from the Kurdistan Workers Party or PKK, it is being claimed.
Local security sources say a group of people, thought to include the victims, had in fact been smuggling fuel and sugar into Turkey from northern Iraq.
There was no immediate confirmation from Ankara of any attack in the village of Ortasu near the border.
But Turkish planes strike militant targets regularly in the region in their battle against the PKK which is waging an armed campaign for a Kurdish homeland.
The group is regarded as a terrorist organisation by Turkey, the European Union and the United States.