Other reports are saying that the motorcycle riders were part of a.club made up mainly of Marine. Veterans.
From the Portland Press Herald (ME) website:
“Charlie St. Clair, executive director of Laconia Motorcycle Week Association, which host one of the state’s biggest rallies in June, said he couldn’t recall an accident of this magnitude involving bikers in the state. He wasn’t on the scene but said had been fielding calls about the accident much of the night. St. Clair said he heard the riders were mostly Marine veterans who belonged to the same motorcycle club.”