A woman has died in an overnight crash on Highway 99 in Surrey, B.C.

Surrey RCMP said the single-vehicle crash happened at 1:30 a.m. and a woman in her 20s was declared dead at the scene.

The woman was a passenger in the car and was “ejected” from the vehicle in the crash, police said.

The car ended up in a farmer’s field, a few hundred feet from the highway.

The Integrated Collision Analysis and Reconstruction Service has been called to assist the Surrey RCMP criminal collision investigation team with the investigation.

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BC Emergency Health Services said five ambulances responded to the crash. Three patients were treated at the scene and two were taken to hospital.

The other two occupants were a 23-year-old man, who was driving, and a 22-year-old man.

Police said it appears speed may be a factor in the crash.

The crash has shut down Highway 99 northbound between King George Boulevard and Highway 91.

The closure has caused massive traffic delays in the area, spilling into adjacent roadways.

It is unclear at this time when the highway will reopen.

Traffic is being diverted onto King George Boulevard.