OTISFIELD — Game wardens continued to investigate on Friday, a day after a boating collision knocked two children and an adult into the water, ultimately leaving eight people injured on Thompson Lake.

Two children remained hospitalized in stable condition while wardens were seeking witnesses to interview about the crash.

The Warden Service identified the operators of the boats as Matthew Nolan, 58, of Potomac, Md., and Ken Bartow, 60, of Biddeford.

According to reports, the boat operated by Bartow, with two children aboard, was running along the shore when it collided with Nolan’s boat, which was towing a water-skier.

Bartow and his two young passengers, 9 and 10 years old, were thrown into the water, as was one of the seven people aboard Nolan’s boat

The 10-year-old in Bartow’s boat suffered cuts and broken ribs, according to a family member. He was expected to be released from a hospital this weekend.

The boy’s 9-year-old friend sustained more serious injuries, including a fractured skull, and was taken by LifeFlight helicopter to Maine Medical Center in Portland. A Bartow family member said the boy was moved out of intensive care Friday.

The 9-year-old’s identity was not available.

The 10-year-old’s mother, Letitia, said the elder Bartow helped save the two boys in the moments after the crash.

“Ken was thrown from the boat,” Letitia Bartow wrote on her Facebook page, “but came up in rescue mode for the boys.” The 9-year-old was unconscious and he helped keep his head above water, she wrote.

Ken Bartow owned Bartow Construction on Route 121 in Otisfield for decades before selling the business and retiring to Biddeford. He and his wife, Polly, are well-known in the area.

Witnesses said another man, a retired attorney who summers on the lake, also came to the rescue, jumping in his boat and motoring out to assist the injured.

That man, later identified as Harold Kowal, took the injured to the New Outpost on Route 121, where first responders from Otisfield and Oxford staged a rescue and set up a landing zone for the LifeFlight medical helicopter at the Otisfield Community Center, also on Route 121.

Game Warden Kristen Barboza, heading the investigation into the crash, said no charges were filed as of Friday night. Wardens were expected to continue interviewing witnesses into the weekend.

“The investigation will take some time,” Barboza said.