WARSAW, Poland (AP) -- Hundreds of angry coal miners in southern Poland are staging an underground strike to protest a plan to close four mines that, the government says, are losing money.
Government talks with the protesting miners broke up Sunday and the protest intensified.
Prime Minister Ewa Kopacz is to travel to the area to rekindle the talks that concern Poland's major energy and heat source. The miners are demanding a major restructuring of the entire sector.
Last week, the government announced a plan to close four mines and lay off or transfer thousands of miners, in order to save the state-owned Coal Company that also has 10 other mines.
Those laid off are being offered two years of severance pay, or paid leave if they are close to retirement.