Almost 80 people sought medical help after three large blasts rocked a TNT plant in Dzerzhinsk in Central Russia. The shockwave damaged around 200 buildings, and a huge plume of smoke is hovering over the city. The blasts were so powerful that people even heard them in another city, some 15km away...The shockwave from the explosions shattered windows in nearby buildings...Authorities have declared an emergency situation in the city...The plant in question makes various types of explosives, mostly used in mining. The series of blasts erupted at the part of the plant that made TNT...This is not the first time explosions had happened at the same explosives-maker. On April 4, a blast brought down one of its one-story structures...A much deadlier explosion occurred in the plant in August, when five of its workers were killed.