A 16-year-old boy was stabbed in the arm during an altercation over a stolen bicycle, according to the Atascadero Police Department.
It happened shortly before 11:30 a.m. Monday in the 6700 block of El Camino Real.
Police say the teenager was treated at the scene by firefighters and then taken by a parent to a nearby hospital for treatment of a non-life-threatening injury.
Officers identified the suspect as Markus Hales, 39, of Atascadero, and took him into custody about a block away.
Hales was reportedly booked into the San Luis Obispo County Jail on charges of assault with a deadly weapon.
Police say their investigation into this incident is ongoing and they ask anyone with further information to contact the Atascadero Police Department at (805) 461-5051.