A 17-year-old boy is accused of helping start a massive wildfire in Ocean County, New Jersey, that burned thousands of acres and triggered the evacuations of 5,000, officials said.

The second suspect -- an unidentified 17-year-old boy -- was taken into custody on Thursday and charged with arson and aggravated arson for allegedly helping set wooden pallets on fire and leaving the area when the fire wasn't fully extinguished, Ocean County Prosecutor Bradley Billhimer said.