The collapse occurred at a coal mine near the town of Soko Banya in southern Serbia.
"Eight miners were killed, about 20 sustained injuries, mostly light. Nearby medical centres sent their teams to help, the injured were taken to the hospital in the town of Aleksinac," the doctor told the Radio Television of Serbia broadcaster.
Several ambulances are said to have arrived at the scene.
According to the Serbian Vecernje Novosti media outlet, 20 people remain in the mine; 10 more have already been brought to the surface.
The cause of the collapse, presumably, was a methane explosion, according to reports.