RANDOLPH, N.H. (CBS/AP) — Motorcyclists and military veterans mourned Sunday as authorities sought help in determining why a pickup truck collided with a group of bikers on a rural New Hampshire highway, killing seven of them.

Read: 7 Dead After Pickup Truck And Trailer Hits Motorcycles In Randolph NH

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The crash in remote northern New Hampshire involved members of Marine JarHeads MC, a motorcycle club that includes Marines and their spouses. Authorities said they might begin identifying victims by name as soon as Sunday.

The tragedy left the close-knit motorcycle community in shock, with many remembering their own close calls on the road.

“Seven people. C’mon. It’s senseless,” said Bill Brown, a 73-year-old Vietnam War veteran and motorcyclist, who visited the accident scene on Saturday to put down flags. “Somebody made a mistake, and it turned out to be pretty deadly.”

Seven people were killed in a crash on Route 2 in Randolph, NH June 21, 2019. (Photo credit: Miranda Thompson)

A pickup truck towing a flatbed trailer collided with the group of 10 motorcycles around 6:30 p.m. Friday on U.S. 2, a two-lane highway in the tiny North Woods community of Randolph. The pickup truck caught fire, and witnesses described a “devastating” scene as bystanders tried to help the injured amid shattered motorcycles.

“[It] was just complete chaos,” Jerry Hamanne, who owns The Inn at Bowman nearby, told WBZ-TV. “And the mangled bikes and the bodies just lying everywhere, screaming for help.”

This weekend’s long-planned “Blessing of the Bikes” ceremony an hour to the north of the crash was expected to be especially emotional this year. Meanwhile, members of the motorcycle community had already begun organizing help for the victims’ families, said Cat Wilson, who organizes a motorcycle charity event in Massachusetts and is a friend of some of the crash victims.

A group called “Suns Out Bikes Out” held a ride to support the JarHeads MC on Sunday morning in West Barnstable, N.H. Proceeds will go to pay for the victims’ funeral costs and medical bills.

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Investigators on Saturday identified the pickup driver as Volodymyr Zhukovskyy, 23, an employee of Westfield Transport, a company in Springfield, Massachusetts.

Zhukovskyy survived the accident, did not need to be hospitalized and has not been charged, authorities said, but they didn’t address details on his whereabouts. A phone listing for him couldn’t be found.

Dartanyan Gasanov, the owner of Westfield Transport, told The Boston Globe that he planned to talk to investigators Monday and has been unable to reach Zhukovskyy, who has not been answering phone calls.

Members of JarHeads MC consoled each other Saturday at the Mount Jefferson View Motel near the crash site. (WBZ-TV)

The National Transportation Safety Board is among the agencies investigating. Authorities asked for the public’s help in the form of videos, photos or other information about the accident or the vehicles involved.

“This is one of the worst tragic incidents that we have investigated here in the state,” New Hampshire State Police Col. Chris Wagner said Saturday. “It’s going to be a very lengthy investigation.”

Along with the seven dead, state police said three people were taken to hospitals. Two of them were released Saturday.

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(© Copyright 2019 CBS Broadcasting Inc. All Rights Reserved. The Associated Press contributed to this report.)