EDISON - A New Jersey Transit train passenger is undergoing a psychological evaluation after authorities say he made a threat against the commuter railroad.

NJ Transit spokesman Jim Smith says 29-year-old Mohammed Mahmoud of South Amboy was riding on a North Jersey Coast Line train headed for Bay Head when he made the unspecified threat around 6 p.m. Monday.

The train was stopped and searched at the Newark Airport Station. Passengers were evacuated while Mahmoud was detained. Nothing suspicious was found.

Passengers were put on another train by 6:30 p.m.

Smith says Mahmoud was charged with causing false public alarm and interference with transportation. It's not known if he has a lawyer.