Two explosions at Russia’s largest coal mine claimed the life of 43 workers that were trapped underground. Over 350 miners were underground when explosions hit Raspadskaya, a coalmine 3,000 km east of Moscow in the Kemerovo region of Siberia, over the weekend. That’s the deadliest accident in a Russian mine since May 2007 when 39 workers died as a result of a methane explosion at Yubileynaya mine, also located in Kemerovo.

Officials said the rising flood waters were complicating the efforts of more than 500 people involved in rescue work on Monday. The project had reserves of some 450 million tonnes of coal and produced 8.9 million tonnes in 2007, according to the Raspadskaya company, which is part-owned by giant steel and mining group Evraz.