Police in Pennsylvania are searching for a gunman after a Walmart employee is shot during an argument inside a store, authorities said. According to reports, two men become involved in a dispute, and during the confrontation an employee is shot. Officers are called to the scene, but the suspected gunman leaves the area before they arrive, according to the accounts. The suspect remains at large as police continue their search. Authorities have not indicated in the available reports whether charges have been filed, what weapon was used, or the condition of the employee at the time of reporting. The search is ongoing, with police working to identify the suspect and determine the circumstances that led to the shooting.