NBC New York reports:

A police bomb squad in New Jersey’s largest city is using a robot to examine a vehicle containing what appears to be two gasoline canisters connected by wires to a device.
The Dodge Omni is parked about six car lengths from a railroad overpass in Newark that serves Amtrak and NJ Transit trains. The trains are still running.
Police have blocked off the section of street below the overpass so traffic cannot go under the tracks. The area is a mostly residential section near a main thoroughfare in Newark.
Witnesses said that that authorities had blocked off a one square block area bordered by Oliver Street, Chesnut Street, Route 21 and New Jersey Railroad Avenue.
Newark PD spokesman Garry McCarthy on the scene said, “We still cant tell,” how serious the device really is.