Two teenage boys are in custody after state police say the youths stole a vehicle and led troopers on a nearly 15-mile chase that reached 120 mph on an upstate New York highway.

Authorities say the stolen vehicle was spotted traveling south on Interstate 81 in the city of Watertown around 9:50 p.m. Monday. Troopers say they attempted to stop it, but the driver didn't comply.

Troopers say the driver continued south, hitting a top speed of 120 mph before exiting the highway in Ellisburg and crashing into a guardrail.

The 14-year-old driver was taken into custody at the crash scene. The other 14-year-old fled on foot but was located nearby several hours later.

The teens were turned over to Jefferson County probation officers and taken to a juvenile detention facility.