An explosion at R.M. Palmer Co. chocolate factory in West Reading, Pennsylvania, on Friday afternoon has left two people dead, with five still missing. Rescue teams using dogs and imaging equipment worked overnight to search the rubble for signs of life. The blast destroyed one building and caused significant damage to another one with apartments, which has been displaced. The cause of the explosion remains under investigation, said the Chief of Police Wayne Holben. UGI Utilities reported that damages from the explosion caused gas to leak that fed the fire. Pennsylvania Governor Josh Shapiro visited the site on Saturday, pledging the state's support in the borough's response to the disaster. Meanwhile, West Reading Mayor Samantha Kaag has declared a state of emergency for the borough to accelerate the allocation of resources to the scene. Investigation teams are exploring all possible causes of the explosion, including a suspected gas leak. Reading Hospital said it had received ten patients, of which two were in fair condition, and one patient transferred to another medical facility, with the others either released or in the process of getting discharged.