Nebraska Reps. Jeff Fortenberry and Don Bacon were among about 100 GOP lawmakers whose chartered train to a retreat crashed into a garbage truck in rural Virginia on Wednesday. No lawmakers or aides were seriously injured, but one person in the truck was killed and two others were seriously hurt.

Fortenberry, whose family was also on the train, tweeted: "Jarring, but everyone OK on train."

He added that someone in the truck appeared to be seriously injured, possibly dead. "A number of Members of Congress who are doctors tried to help," he tweeted.

Rep. Adrian Smith and Sen. Ben Sasse were driving to the retreat and Sen. Deb Fischer is home in Nebraska.

The collision happened at about 11:20 a.m. in Crozet, Virginia, about 125 miles southwest of Washington, tearing the truck in two, crumpling the nose of the locomotive and scattering trash alongside the tracks.

The train was carrying Republican members of the House and Senate, plus some family members and aides, to the Greenbrier resort in White Sulphur Springs, West Virginia, for a three-day issues retreat featuring appearances by President Donald Trump and Vice President Mike Pence.

Rep. Robert Pittenger of North Carolina said he was standing at the train's refreshment stand, waiting to be served a soft drink, when he felt "an enormous slam. ... It was a huge jolt. We all hung on to whatever we had."

Authorities gave no details on the cause of the wreck, which took place at a crossing protected by gates, flashing lights, bells and warning signs. The National Transportation Safety Board sent a team to investigate.

Florida Rep. Neal Dunn, a former Army surgeon, said he and other lawmakers who are doctors joined other passengers who are nurses or paramedics and jumped out of the train with the basic medical gear they had. They broke into three teams to help the injured people in the truck, he said.

"The first gentleman was somebody who had really, really, really devastating injuries. We did try to resuscitate, but ultimately you had to realize it wasn't possible," Dunn said. He said another man in the truck was critically injured and a third was seriously hurt.

Amtrak said two crew members and three passengers were taken to a hospital with minor injuries.

Minnesota Rep. Jason Lewis' staff tweeted that the first-term congressman was among those taken to the hospital and was being checked for a possible concussion. Others aboard the train reported bumps, bruises and sore joints.

House Speaker Paul Ryan of Wisconsin was on the train and was unhurt, aides said.

By early afternoon, lawmakers were boarding buses to resume their trip.