Brussels, Shawwal 19, 1436, August 04, 2015, SPA -- Several people were injured Tuesday after an oil furnace exploded at a site owned by the US pharmaceutical giant GlaxoSmithKline in Belgium, local media reported, according to dpa. A production technician was seriously injured while three other workers were in a state of shock, the Belga news agency wrote. The incident occurred at a vaccine research and development facility in Rixensart, about 20 kilometres south of Brussels. Several furnaces located outside production buildings had been undergoing maintenance at the time of the blast, Belga quoted a company spokesman as saying. The explosion propelled a lot of debris, injuring the nearby technician, Belga said. The safety and functionality of the site has not been affected, the broadcaster RTBF reported. --SPA 22:18 LOCAL TIME 19:18 GMT www.spa.gov.sa/w