Dozens Feared Dead in Ukraine Mine Blast

A miner waits for a bus to leave the Zasyadko coal mine after the explosion, in Donetsk March 4, 2015.

Miners gather near the Zasyadko coal mine after an explosion, in Donetsk, Ukraine, March 4, 2015.

Miners arrive to help with the rescue effort at the Zasyadko coal mine in Donetsk, March 4, 2015.

People comfort each other as they wait to hear news about the coal miners after an explosion at the Zasyadko mine while pro-Russian rebels stand nearby, Donetsk, March 4, 2015.

Ukrainian coal miners prepare before going underground at the Zasyadko coal mine in Donetsk, March 4, 2015.

Pro-Russian rebels gather near the Zasyadko coal mine after an underground explosion occurred, Donetsk, March 4, 2015.

A woman reacts as she walks past pro-Russian rebels guarding the Zasyadko mine in Donetsk, March 4, 2015.