WEST READING, Pa. (AP) — An explosion at a chocolate factory in Pennsylvania Friday killed three people and left four missing, but authorities say one person was found alive in the rubble. West Reading Borough officials say a number of people were injured by the explosion at the R.M. Palmer Co. plant just before 5 p.m. Police Chief Wayne Holben says the death toll rose on Saturday with the discovery of a third body in the community about 60 miles northwest of Philadelphia. Fire Chief Chad Moyer says four people remain missing as the search for victims continues and fire investigators work to determine a cause. The explosion destroyed one building and damaged a neighboring building with apartments. A spokesperson says eight people were taken to Reading Hospital Friday evening