TBILISI, Georgia, March 03, SPA -- Georgian officials say a powerful explosion killed four coal miners in the ex-Soviet state. The Interior Ministry said Wednesday several more miners were wounded in the blast in the western town of Tkibuli, one of them severely. It said the blast apparently was due to methane, the Associated Press reported. --SPA 14:27 LOCAL TIME 11:27 GMT www.spa.gov.sa/754410