At least 14 people are dead following an accident in a coal mine in Siberia on Thursday, including three rescuers who were sent down as part of rescue efforts.
At least 11 miners died in the initial accident, when coal dust ignited in a ventilation shaft, filling the mine with smoke.
At least 239 have made it above ground.
However, the country's Emergencies Ministry fear there could be further casualties, including among rescuers.
"Recently the bodies of three rescuers were found, and now they are being lifted to the surface. The fate of the three other rescuers is currently unknown. The search continues."
Dozens of people are being treated in hospital, some of them for smoke poisoning. Authorities say four are in critical condition.
The mine is located in the coal-producing region of Kemerovo, some 35-hundred kilometers east of Moscow.
The region has suffered fatal mining accidents in the past, including in 2010, where an explosion at a mine killed more than 90 people.