BELGRADE, Yugoslavia (AP) _ Slobodan Milosevic's police entered a major coal mine south of here Wednesday to break up one of the biggest strikes launched so far to drive the Yugoslav president from power, an independent news agency said.

Truckloads of police and soldiers entered the Kolubara mine complex after the government said the five-day strike threatened electricity supplies, the independent Beta news agency said.

A striker who answered the telephone at the facility said miners were refusing to leave the compound and so far there had been no clashes nor arrests. He refused to give his name.

Beta quoted a strike leader Predgrag Stefanovic as appealing to residents of nearby towns ``to come and help us.''