Update -- Officers have identified 18-year-old Andujar De Leon-Diaz as the victim.
His death is Austin's 68th traffic fatality this year. Last year at this time, there were 48 traffic fatalities.
Anyone with information on the incident is asked to call APD's Vehicular Homicide Unit at (512) 974-4724.
Earlier -- Police are investigating a crash Saturday night that killed one person in North Austin.
It happened just before 11:30 p.m. on North Lamar Boulevard just north of Highway 183. Officers say the driver traveling at a high rate of speed when the car left the roadway and hit a tree.
No other vehicles were involved in the crash. The driver was pronounced dead at the scene.