UPDATE: A spokesman for Burlington Northern Santa Fe says they believe someone deliberately uncoupled a train, sending it rolling eastbound where it smashed into another westbound train.

BNSF spokesman Joe Faust tells KRMG a train loaded with car wracks bound for California was parked in the Cherokee Yard, near Trenton Ave.

They believe someone tampered with a coupling device, and the train began rolling backward.

The crew on the second train, heading into Tulsa from Chicago, saw their green track lights turn red and realized something was wrong.

They managed to jump off the second train before the first one smashed into it.

Faust said all the engines have video equipment which they hope will help them determine exactly what happened, and who might have been involved.

A freight train hauling new automobiles is off of the railroad tracks in the Dawson community of north Tulsa, and KRMG has learned it was a violent collision with a second train that led to the derailing.

Callers to the 911 emergency number reported hearing a loud noise at about 12:38 a.m. Friday near 1800 North Fulton Avenue.

Tulsa police tell us that eleven or twelve of the train's cars were derailed along the tracks between North Yale Avenue and near Sheridan Road.

All roads between Yale and Sheridan are shut down, north and southbound, and will remain so for many hours to come.

Drivers should go west to Harvard or east to Memorial to get around the train.

We're told two of the train cars are tankers that were carrying syrup.

Firemen were trying to contain what was reported to be 3,000 gallons of diesel fuel that was leaking into Coal Creek.

Tulsa Public Works crews cleared a tree that was knocked down and was partially blocking Yale Avenue near Dawson Road.

There were no reports of injuries.