Six people were sent to the hospital Thursday after a crash involving a UC San Francisco shuttle bus and two cars on Potrero Avenue.
About 11:18 a.m., a car traveling southbound on Potrero Avenue rear-ended another car at 22nd Street, according to police and fire officials. The second car then rammed into the shuttle bus from behind.
The drivers of both cars were taken to the hospital, according to police spokesman Sgt. Michael Andraychak. Four of the 12 passengers aboard the shuttle went to the hospital with minor injuries.
Officials initially said as many as 15 people were injured.
“There was no sign of any impairment of the drivers and no indications of speeding,” Andraychak said. Police shut down Potrero Avenue between 21st and 22nd streets for at least an hour after the crash.
The shuttle bus was on its regular route between the 16th Street BART station, the Mission Center and San Francisco General Hospital, said Jon Gledhill, director of UCSF Transportation Services.
The shuttle buses ferry employees and patients throughout the UCSF campus network, covering 16 routes.
A UCSF shuttle van was involved in a fatal pedestrian collision in the Tenderloin on Nov. 17.
In that incident, the shuttle bus was reportedly traveling north on Leavenworth Street attempting to make a left turn onto Geary Street when it struck a pedestrian in a crosswalk.