A doctor shot and killed a former colleague before turning the gun on himself in New Jersey Wednesday, authorities say.
Camden County Prosecutor's Office spokesman Jayson Laughlin says Dr. Giocondo Navok opened fire on 32-year-old Dr. Payman Houshmandpour as he prepared to drive to work from his Voorhees home.
Laughlin says Navok died of a self-inflicted gunshot wound after police stopped the 39-year-old and ordered him to get out of his vehicle.
Laughlin says both men used to work at Virtua Health Systems.
Houshmandpour, who is married, worked at Virtua Health Systems. Laughlin left Virtua about two years ago.
Authorities are not yet sure what sparked the shooting.
Get the latest from NBC 4 New York anytime, anywhere. Follow us on Twitter, Facebook and Google+. Sign up for email newsletters here. Get breaking news delivered right to your phone -- just text NYBREAKING to 639710. For more info, text HELP. To end, text STOP. Message and data rates may apply.