ELIZABETH TOWNSHIP (KDKA) — A tractor trailer crashed over a hillside late Thursday night, sending emergency crews and environmental officials to Elizabeth Township.

The crash was reported just after 9:30 p.m. on Douglas Run Road near Nichols Hill Avenue.

(Photo Credit: KDKA)

At least one person became trapped inside the rig, officials said. That person’s condition has not been released.

Allegheny County officials said Hazmat teams were also called in due to a fuel spill.

According to the Tribune Review, about 4,800 gallons of an unknown substance got into the Allegheny River.