UPDATE: One Lane Open Folllwing Tractor-Trailer Fuel Spill On GWB

Traffic was moving slowly following a fuel spill and motor vehicle crash on the George Washington Bridge's upper level, authorities said.

Forty to 50 gallons of diesel fuel spilled onto the roadway and closed the entire New Jersey-bound upper level Friday afternoon, said Joe Pentangelo, a Port Authority spokesman.

The New York City Fire Department received a call regarding the crash at 12:13 p.m. The crash appears to have been caused when the track hit part of the bridge, fire officials said.

Traffic was moving slowly after one westbound lane opened at 1 p.m. Lanes one, three, and five will be closed for "an undetermined amount of time" as clean-up continues, Pentangelo said.

The tractor-trailer has been removed from the bridge, Pentangelo said.

NJ511.org reported that the crash occurred mid-span.

Photos of tractor-trailer and subsequent clean-up on the upper level of the George Washington Bridge Friday. Photos courtesy of the Port Authority of New York and New Jersey