SALT LAKE CITY (AP) — Authorities are looking for a man who was driving a car involved in a hit-and-run wreck that killed a motorcyclist on a Salt Lake City freeway.

According to Sgt. Justin Dial of the Utah Highway Patrol, the car’s driver was seen leaving the scene on a foot and that at least one witness reported seeing at least one of the two vehicles driving aggressively before the wreck on the State Route 201 early Friday morning.

No detailed suspect description is available and the motorcyclist’s identity wasn’t released.