Ivan Lazarenko says he's lucky to be alive.
Dozens on his colleagues were killed when an explosion tore through a coal mine in the rebel-held Ukrainian city of Donetsk. Fifty others are believed trapped underground.
Ukraine officials say emergency relief crews are being hampered by pro-Russian separatists in the city. Prime Minister Arseny Yatseniuk blames Moscow.
(SOUNDBITE) (Ukrainian) UKRAINIAN PRIME MINISTER, ARSENY YATSENIUK, SAYING:
"That is why I publicly address the President of the Russian Federation to give instructions to these bastards to allow our mine-rescue brigades to save the lives of miners."
Those who made it out alive say they're still in shock.
But the lives of the men still trapped undeground may depend on how quickly rescue workers can reach them.