WALKER, Mich. (WOOD) — Rescue crews in Walker responded after a vehicle plunged into the Grand River early Monday.

Authorities were called to the boat launch off Veterans Memorial Drive, near Riverbend Drive, shortly after 1 a.m.

Police say no one was inside the vehicle when fire crews and a dive team first found the minivan. A tow truck pulled the vehicle from the water around 3 a.m.

The Georgetown Township Fire Department’s water rescue unit was on scene, along with Walker police and fire crews.

The investigation into this incident is ongoing as police are still working to figure out how long the minivan was in the water before authorities arrived.