Up to seven people are feared dead following an explosion at a hydroelectric power plant at a reservoir in northern Italy. Three men aged between 35 and 73 were found dead at the facility at the Suviana reservoir following Tuesday’s blast. At least five workers suffered serious burns. Four people are still missing on Wednesday more than 24 hours after the accident. Rescue crews said they have all but given up hope of finding anyone else alive. “We are working without much hope of finding the missing alive,” a spokesman for the fire brigade said. The exact circumstances of the blast are still u…