The blast took place in the Sukhodolsk-Vostochnaya coalmine at Krasnodon in the Lugansk region when 28 miners were working in the shaft, Interfax reported quoting disaster management authorities of Ukraine.
The authorities said that the fate of 10 miners remains unknown. Two miners with serious burns were evacuated by the rescuers.
Officials did not provide details on the cause of the blast. Most of the country's mine disasters have been caused by build-ups of methane gas.