The Latest: NJ mayor: 1 of 5 devices found explodes

A New Jersey mayor says one of five devices found in a backpack near a train station has exploded while a bomb squad robot was attempting to disarm it. Elizabeth Mayor Christian Bollwage said that the device exploded shortly after 12:30 a.m. The FBI was leading the investigation and working to disarm the other four devices. There were no reports of injuries. Bollwage said to expect more detonations.