An OnStar vehicle security system led Washtenaw County sheriff's deputies to a stolen car Sunday night, and two teenagers found inside were arrested, police said.

Sometime between 9 p.m. and 11:45 p.m., someone opened an unlocked door of a vehicle parked in the 500 block of Pinewood Street in Ypsilanti Township and stole it, a sheriff's summary said. The keys were left inside the car.

The OnStar system led deputies to the vehicle in the 700 block of Green Road in Ypsilanti. A 17-year-old girl from Ypsilanti and 15-year-old boy from Ypsilanti Township were inside, the summary said.

The girl was taken to the Washtenaw County Jail, and the boy was turned over to a parent. The case will be forwarded to the Washtenaw County Prosecutor’s Office for review for criminal charges, the summary said.