A portion of West O Street is closed on Monday morning as police investigate a crash.
Eastbound traffic at West O and Southwest 40th Street is closed.
Authorities tell 10/11 News that around 2:15am, a vehicle collided with a person riding a bicycle.
That bike rider was sent to the hospital with life threatening injuries.
Authorities are questioning the driver of the vehicle.
The street is shut down while police conduct their investigation.