MENASHA, WI (WTAQ) - Authorities say an overturned semi truck has shut down a portion of Highway 441.

Neenah-Menasha firefighters say the westbound lanes of 441 at Appleton Road may be closed for hours while they work to put out a fire.

The crash was reported just before 11 a.m. Wednesday. As of about noon, they were not sure if anyone was hurt or what was inside the semi.

Meanwhile, traffic is being re-routed off the highway at Oneida Street and back on at Appleton Road.