Separatist officials in rebel-held eastern Ukraine say a methane blast at a coal mine has killed at least four people and 13 others are believed to be missing.
Russia's War Against Ukraine
Associated Press: Mine blast in separatist-held Ukraine kills 4
Miners gather after their shift in the Kholodnaya Balka coal mine in Makiyivka, Donetsk Oblast, on Sept. 26, 2016.
