GRAFTON, Ill. (AP) – Police in Southern Illinois are looking for information about who might have been driving a car that went into the Illinois River.

The (Alton) Telegraph reports (http://bit.ly/2ibCK35 ) a vehicle went into the river Saturday night just upstream from the Grafton lighthouse. The landmark is located about 40 miles north of St. Louis.

Emergency responders said divers had been unable to enter the water as of Monday afternoon because of ice.

According to Grafton Police Officer Brett Vetter, witnesses said it appeared there was an adult in the vehicle when it entered the river. They gave a general description of the car, which they said was a four-door, dark in color, possibly older model such as a Ford Crown Victoria.

Vetter says want to identify the potential drowning victim.