PITTSFIELD – Six people were injured Friday in an accident on Interstate 95 which state police believe may have been caused by a medical problem.

All of the injured – a family of four from New Brunswick and a couple from Missouri – were taken to Sebasticook Valley Hospital in Pittsfield. Information on the victims’ medical conditions was not available early Friday evening. Hospital policy prohibits the release of all patient information, a spokesman said.

Although a hydraulic extrication device was needed to remove one of the Missouri residents from the wreckage, none of the injuries appeared to be life-threatening, according to Sgt. Gary Wright of the Maine State Police.

Wright said the accident occurred about 2:30 p.m. in the northbound lanes of I-95. A late- model Buick driven by Earl Tweedy, 80, of Missouri drifted to the outside edge of the traveling lane, caught the shoulder and traveled back across the centerline into the passing lane, where the car struck a 1996 International tractor-trailer driven by Brian Glazebrook, 27, of Tower Hill, New Brunswick.

Both vehicles left the highway, traveling nearly 200 feet into the woods at the road’s edge, Wright said. The car and the truck, registered to West Isles Seafood Ltd., of Deer Island, New Brunswick, were demolished.

Wright said that the accident remains under investigation but that police believe Tweedy might have temporarily lost consciousness before the crash.

Both motorists were traveling with passengers. Glazebrook was traveling with his 25-year-old wife, Tanya, and their two children, ages 4 and 2. Glazebrook’s wife and children were in the tractor’s sleeping compartment at the time of the crash.

Tweedy was accompanied by his wife, Colleen, 71, and their Maine coon cat, Wright said. The cat ran into the woods after the crash, and rescuers were still trying to locate it late Friday afternoon. The driver and his wife both were wearing seat belts.

According to Wright, a physician’s assistant and a registered nurse who saw the accident gave first aid. Their names were not immediately available. The two women, one of whom reportedly was from Hampden, remained until emergency rescue crews from Pittsfield and several surrounding communities arrived.