ARLINGTON — A 22-year-old Canadian man has been arrested in connection with an Interstate 5 accident that killed a Vancouver, B.C., woman on Monday, Sept. 6.

The Quebec resident, who was driving a 1997 Nissan Pathfinder by milepost 208 near Arlington when it left the roadway and collided with a cement barrier, was booked in Snohomish County Jail, said Trooper Keith Leary of the Washington State Patrol.

Twenty-five-year-old Catherine H. Halliwell and 26-year-old Sara G. Edge were not wearing their seat belts in the backseat of the SUV when the crash occurred. The impact caused Nissan’s rear hatch to open, which ejected the two women.

Halliwell was airlifted to Harborview Medical Center in Seattle, where she died late Monday.

Edge was transported to Cascade Valley Hospital in Arlington. Her condition was not known as of Tuesday, Sept. 7.

Official said they think that marijuana may have played a role in the accident.

Leary said that the three Canadian residents were on their way back from The Gorge Amphitheatre in George, Wash., where they had seen a Dave Matthews Band concert.

“Obviously if they would have been wearing seatbelts it wouldn’t have been fatal,” Leary said.