Gas blast erupts at Norway dairy plant FREDRIKSTAD, Norway, April 24 (UPI) -- A gas explosion at a dairy plant in Fredrikstad, Norway, killed one and injured three, police said. The blast occurred around 4:16 p.m. local time, Monday, causing major damage to the main factory building and other buildings in the vicinity. Jan Erik Amundsen witnessed the blast from a nearby car parts store. "The entire glass front blew in," he told The Local. The roof collapsed. Monica Nordahl was working in the factory when the explosion happened. "I felt my chest being squeezed in," she said. The pressure was tremendous. I was standing right there. Everyone was shocked. I still have glass splinter on me.