DONETSK, December 5. /TASS/. Ukrainian troops have been pushed out of some positions at the Central Mine in the town of Dzerzhinsk (called Toretsk in Ukraine), a security official told TASS.

According to the official, this was one of the most important Ukrainian strongholds in the area.

"Assault operations are now underway at the mine; enemy troops have been pushed out of their positions but they are still trying to fight, using drones," he said.

The official added that a mop-up operation continued in the area.