A bicyclist has been seriously injured after a crash Friday morning.
A Tempe police spokesperson said the bicyclist and a vehicle collided just after 6 a.m. near 48th Street and Baseline Road.
The 19-year-old bicyclist was not wearing a helmet, police said, and taken to the hospital with life-threatening injuries.
Impairment is not suspected to be a factor in the crash, said police.
The westbound lanes of Baseline Road are closed from the Arizona Grand to 48th Street.