Xinhua Net reported that seven workers were injured in a coal mine blast in Ukraine’s eastern Donetsk region on midnight. State Emergency Service said in a statement that a mixture of methane and air exploded in the “Pokrovskaya” mine at a depth of 470 meters, when 406 miners were working underground.
According to the statement, rescuers evacuated the trapped miners to the surface within an hour, and the injured have been taken to a hospital.
One of the injured is in grave condition, according to authorities.
The blast was the second accident in “Pokrovskaya” mine this year. Eight miners were injured in a methane gas explosion inside the mine in January.
Twenty-three people died and 757 others were injured in coal mine accidents in Ukraine last year.