(FOX40.COM) — An overturned truck leaked diesel fuel — and blocked traffic — on a U.S. Highway 50 off-ramp in Sacramento on Wednesday, and hazmat crews are still cleaning up the mess.

An off-ramp on westbound U.S. 50 was closed before noon Wednesday after a semi-truck overturned, according to the California Department of Transportation. The driver was injured in the crash and was transported from the scene.

The truck is leaking fuel on the freeway, a spokesperson for the Sacramento Fire Department told FOX40. Because of the leak, the situation is a “working hazmat incident.”

After offloading the fuel to another tanker truck, the diesel truck was put back on its wheels Wednesday afternoon.

However, Caltrans was still on the scene for hazmat cleanup as of 3 p.m., officials said. The off-ramp to 10th Street is still closed, as is the No. 6 lane.

The California Highway Patrol confirmed the truck was leaking diesel fuel and said drivers should expect “heavy delays” in the area.

The transportation department encouraged drivers to use alternate routes and said there is no estimated time the off-ramp will reopen.