The car crashed into the Highway 99 overpass over the 32 Avenue diversion at about 10:30 a.m. PT, according to a news release. All three people in the vehicle were dead when Mounties arrived.
Surrey RCMP said they called in IHIT investigators on Tuesday afternoon, and they will be working together on the case.
Jang said detectives are looking for dash cam video from the area around the time of the incident and would like to speak to anyone who might have information that could help the investigation.
Meanwhile, investigators were trying to determine what happened before the crash.
Drivers are being advised to avoid the area, as several road closures are in effect until further notice:
32 Avenue at 152 Street
32 Avenue at King George Boulevard
Highway 99 southbound Exit 8B
Anyone with information about the crash can call Surrey Mounties at 604-599-0502 or Crime Stoppers at 1-800-222-8477.