CARTER LAKE, Iowa (AP) — Police in Omaha, Nebraska, on Thursday found the body of a woman inside a car discovered submerged in a far western Iowa lake.

Officers patrolling the area found the submerged car in Carter Lake just before 1 a.m. Wednesday, police said. The car’s headlights and taillights were still on when the officers found it in the water.

The Omaha Fire Department was called to pull the car from the water, and the body of Nyahon Thuok, 22, of Omaha, was found inside it.

Police are investigating to determine how the vehicle ended up in the lake.

Carter Lake is in Iowa, but lies on the western side of the Missouri River and is surrounded by Omaha. The town originally sat on the east side of the Missouri River, which separates Iowa and Nebraska, but a shift in the river in the late 1800s left the city on the west side of the river, and the U.S. Supreme Court ruled in 1892 that the city still belonged to Iowa.