A powerful explosion shook a petroleum processing plant near Houston early Wednesday and injured at least three people, authorities said. TPC Group, which processes crude oil into products for the petroleum and chemical industry, said the blast occurred around 1 a.m. at a "processing unit" at its plant in Port Neches, Texas, about 85 miles northeast of downtown Houston. KHOU-TV reported "multiple" explosions at the plant. "The event is ongoing ...