Police in the U.S. state of Kentucky say an employee shot and killed four people at a plastics plant before killing himself, reported ap. Henderson police Lieutenant David Piller says the shooting happened early Wednesday after an employee at Atlantis Plastics had an argument with a supervisor. In addition to the four deaths, Piller says two other people who were injured were flown to hospitals in Evansville, Indiana. Piller says the employee used a handgun he got from home during a break. The names of those involved have not been released.