A man and woman seriously injured in a head-on crash Saturday in Concord remained Tuesday at a Bangor hospital, with the woman listed in critical condition, officials said.

Kennedy Humphrey, 18, of Bingham was a passenger in a 2007 Nissan Altima being driven north at about 1 p.m. on Kennebec River Road by Adrean Yates, 27, also of Bingham, when the car collided with a Chevrolet pickup truck being driven south by Kade Tibbetts, 25, of Embden, according to the Somerset County Sheriff’s Department.

A spokeswoman at Northern Light Eastern Maine Medical Center in Bangor said Tuesday that Humphrey was in critical condition.

The spokeswoman said she had no information on Yates. However, Mike Mitchell, chief deputy of the Somerset County Sheriff’s Office, said Tuesday that Yates was in the intensive care unit at that hospital and in serious condition.

A 1-year-old child who was in a safety seat in the back seat of the Altima was taken by ambulance to Redington-Fairview General Hospital in Skowhegan after the crash. The baby suffered injuries not considered life-threatening to its legs, according to both Mitchell and Deputy Stacey Slate, who is assisting Deputy Allen-Michael Jones in the investigation.

Both Yates and Humphrey were taken Saturday by a LifeFlight of Maine helicopter to the Bangor hospital.

Tibbetts, who was alone inside the pickup truck, was also taken to Redington-Fairview General Hospital with injuries considered non-life-threatening, according to officials.

Mitchell said the three adults were wearing seat belts. Kennebec River Road, also known as state Route 16, runs parallel to the western bank of the Kennebec River, south of Bingham.

The cause of the collision remains under investigation, Mitchell said Tuesday. Maine State Police are reconstructing the crash, he said.

The Bingham and Solon fire departments, as well as Upper Kennebec Valley Ambulance Service and Anson-Madison-Starks Ambulance Service, responded to Saturday’s crash.