Seoul, Ramadan 16, 1436, Jul 3, 2015, SPA -- An explosion at a chemical plant in South Korea killed six people Friday, a media report said. Another employee at the factory in the south-eastern city of Ulsan was injured. Officials suspected a waste storage tank exploded while welding work was being carried out, dpa reported. --SPA 15:01 LOCAL TIME 12:01 GMT www.spa.gov.sa/w