SEASIDE HEIGHTS - Firefighters have extinguished a flare-up following the massive fire that swept through a New Jersey beachfront boardwalk three days ago.

The Ocean County Prosecutor's Office says the flare-up occurred at about 2:20 a.m. Sunday in a debris pile on the south end of the boardwalk in front of the Sawmill Bar. Fire companies from Seaside Park and Seaside Heights extinguished the fire by 3 a.m.

At that same spot, ATF agents were spotted rummaging through debris and examining an electrical box. They were seen taking photos of the box's guts. It was right around the area of the Kohrs Frozen Custard shop where employees say the fire started underneath the boardwalk.

Meanwhile, Gov. Chris Christie has pledged $15 million to help the dozens of businesses affected by the boardwalk blaze last week.

Yesterday, the governor made his third trip to Seaside since Thursday's fire, offering words of encouragement to those affected. He also brought together business owners and state officials who could help them with loans and demolition.

The rebuilding money will come from the Stronger New Jersey Business Programs, originally set up to help shops damaged by Superstorm Sandy.

The Christie administration says it will deploy crisis counselors to aid Seaside residents and business owners. They will be available at the Seaside Heights Community Center at Bay and Hancock avenues from 3 to 9 p.m. on Monday and Tuesday.

AP wire services contributed to this report.