SIOUX CITY, Iowa (AP) — Sioux City area agencies have resumed searching the Missouri River for a car reportedly driven off a road into the water.

The search was called off around 8 p.m. Monday because of darkness. Rescue crews had been sent to the scene near Larsen Park around 4:20 p.m. The searchers renewed their efforts Tuesday morning.

Sioux City Fire Rescue Capt. Dave Ahlers says authorities aren't sure whether anyone was inside the car. A city news release says witnesses reported seeing a small brown vehicle floating before going under the water's surface.