A search of a red Chevrolet Beretta in American Canyon turned up a .357 magnum and six baggies of marijuana early Saturday morning. American Canyon police arrested two Vallejo men — Brandon Singleton and Terry Jasper, both 18 — on suspicion of possession of a dangerous weapon, carrying a loaded firearm in public, possession for sale of marijuana and other charges after the vehicle they were riding in came to a halt at Highway 29 and Mini Drive.

Police followed the vehicle and pulled the men over after they failed to stop for two stop signs, American Canyon Police Sgt. Mike Collins said. Singleton and Jasper were booked into the county jail.

American Canyon Police made another arrest late Sunday evening after spotting two suspicious pedestrians on Donaldson Way. Police stopped Robert Henderson of Vallejo, who was accompanied by an unnamed female. American Canyon Sgt. Mike Collins said Henderson, 37, was carrying two knives and was arrested on suspicion of possession of a controlled substance, possession of a hypodermic syringe and other charges.

Drug stop, DUI in Napa

A Fairfield man was arrested in Napa Saturday evening after being stopped because one of his vehicle’s headlights was out. Don Lotz, 31, consented to a vehicle search at Brown and Pueblo streets, and Napa Police found Vicodin and morphine tablets in the car, Napa Police Sgt. Don Honey said.

Lotz, who did not have a prescription for the medications, said he got the tablets from friends for his back pain, police said. Lotz was booked into the county jail at 7:43 p.m. Saturday, according to police.

Napa Police made a felony DUI arrest late Sunday evening after an American Canyon man was stopped at California Boulevard and Pueblo Avenue. Napa Police Sgt. Don Honey said Tomas Rodriguez, 37, was arrested on suspicion of felony DUI after an unnamed passenger in his vehicle was injured. Police are still investigating the incident, Honey said.