AFAD said search and rescue teams were searching for another worker who was trapped at the site.
Turkey’s energy ministry said the coal mine was unlicensed and had been operating illegally.
“The activities of the mining field in Sirnak where the accident took place were stopped by the General Directorate of Mining Affairs in 2013 because it carried operational and security risks,” the energy ministry said.
Workplace accidents are not unusual in Turkey. Its rapid growth over the past decade has seen a construction boom and a scramble to meet soaring energy and commodities demand, with worker safety standards often failing to keep pace.
Its worst ever mining disaster took place in May 2014 in the western town of Soma, where 301 workers were killed.