"An explosion occurred at the minus 300-meter elevation at 6:15 p.m. local time (1515 GMT) at the Amasra Hard Coal Enterprise," Bartin province said in a statement.
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Bartin Governor Nurtac Arslan told reporters earlier in the day that rescue teams managed to pull out 14 miners, while at least 49 were still trapped.
The mine has intense methane gas, and they have a suspicion of a firedamp explosion, Mayor of Bartin's Amasra District Recai Cakir told reporters.
A total of 149 searches and rescue personnel, with five National Medical Rescue Team vehicles, 31 ambulances, and one emergency response vehicle were dispatched to the scene, Health Minister Fahrettin Koca tweeted.
In 2014, as many as 301 people died in Türkiye's worst mine disaster in a fire inside a coal mine in Soma town of western Manisa province.