A bicyclist broke her arm Monday night when she crashed head-on with a vehicle in Serra Mesa, San Diego Police said.
Investigators suspect the woman on the bike may have been drinking before the collision at 7:55 p.m. at Chalar Street and Murray Ridge Road.
According to police, the woman in her 40s was not wearing a helmet when she rode against traffic and veered out of the bike lane, likely causing the crash.
Witness Conner Shean said it sounded like a car hitting a dumpster.
"It was screeching, screeching, screeching and then heard a massive impact and saw a person land on their back," Shean said.
Police said the woman was left with a compound fracture to her arm and other, nonlife-threatening injuries.
The driver of the vehicle stayed at the scene to answer police questions. She will not face any charges, police said.
Officers closed down southbound Murray Ridge Road at Chalar Street as investigators examined the scene.