Police arrested a 38-year-old Montclair man hours after the collision, which also left two other bicyclists injured.
MONTCLAIR, Calif. — Two bicyclists were killed and two others were injured after a driver struck several members of a roughly 30-person Halloween bicycle ride late Saturday and left the scene, according to the Montclair Police Department.
The collision was reported about 10:39 p.m. Oct. 24 near Kingsley Street and Tudor Avenue in Montclair, a San Bernardino County city east of Los Angeles. Police said the group was riding east on Kingsley Street when a westbound vehicle struck several cyclists. Investigators later arrested 38-year-old Montclair resident Valentin Alberto Rodriguez on suspicion of driving under the influence, hit-and-run and other offenses connected with the crash.
One bicyclist was pronounced dead at the scene. Two other riders were taken to a hospital, where one of them later died. The surviving hospitalized rider suffered major injuries and was reported in stable condition. A fourth bicyclist suffered a minor head injury and declined further medical treatment, according to police accounts released Sunday.
Authorities had not publicly identified the two people who died as of Sunday. Police also had not released identifying information about the other injured riders. The group was participating in what investigators described as a self-coordinated Halloween ride involving about 30 cyclists. Authorities said the ride was not sponsored, organized or affiliated with the city of Montclair.
Police said the driver left the area after the collision. Information provided by witnesses helped investigators identify a suspect and locate him at a residence near the crash scene. Rodriguez was arrested at about 2:40 a.m. Sunday, roughly four hours after the collision, and was booked into the West Valley Detention Center.
Rodriguez was booked on suspicion of driving under the influence causing injury or death, driving with a blood alcohol concentration of at least 0.08% and causing injury or death, felony hit-and-run involving death or serious injury, and gross vehicular manslaughter while intoxicated. The booking allegations are accusations, and authorities had not announced a conviction or final charging decision.
Initial reports from the scene described damaged bicycles and vehicle debris scattered along the roadway as emergency crews and investigators worked in the residential area. Some witnesses and local television reports also said a victim was dragged for a substantial distance after being struck. Accounts differed on the exact distance, and authorities had not released a complete public reconstruction of that portion of the collision.
Several early reports were published while officers were still searching for the driver, but police later confirmed that a suspect had been taken into custody. Investigators have not publicly detailed what happened immediately before the vehicle struck the group or released a complete account of the vehicle’s path after the impact.
The investigation remained active Sunday. Authorities had not released the names of the two people killed or additional information about the surviving victims, and no final determination about criminal responsibility had been announced. Police continued seeking information as investigators worked to establish the full sequence of events surrounding the fatal collision.
Author note: Last updated October 25, 2026.