A deadly explosion ripped through a Texas fertilizer plant near Waco late on Wednesday, injuring more than 100 people, leveling dozens of homes and damaging other buildings including a school and nursing home, authorities said. They said an undetermined number of people had been killed, and that the death toll was expected to rise as search teams combed through the rubble of the demolished plant and surrounding homes. "We do have confirmed fatalities," Texas Public Safety Department spokesman D.L. Wilson told a news conference about four hours after the explosion. "The number is not current yet. It could go up by the minute. We're in there searching the area right now and making sure that it's safe." The blast, apparently preceded by a fire at the plant, was reported at about 8 p.m. CDT (0100 GMT on Thursday) in West, a town of some 2,700 people about 80 miles south of Dallas and 20 miles north of Waco. West Mayor Tommy Muska told Reuters that five or six