A total of 10 suspected DUI drivers were arrested Friday night, including one at a Petaluma checkpoint, during the first day of a 18-day crackdown by Sonoma County police officers.

The stepped-up enforcement is part of the county’s Avoid the 13 DUI Task Force, which includes all police agencies in the county, under a grant from the state Office of Traffic Safety via the National Highway Traffic Safety Administration.

Petaluma Police Sgt. Ken Savano, who coordinates the Avoid the 13, said a large-scale checkpoint planned in Petaluma was scrubbed because of the rain, but later a checkpoint was held at Petaluma Boulevard North at Oak Street. Of the 121 vehicles that passed through the checkpoint from 11 p.m. Friday to 2 a.m. Saturday, one driver was arrested on suspicion of DUI, although seven drivers were administered field sobriety tests.

As part of the crackdown, additional officers hit the streets to specifically look for suspected DUIs. As a result, two drivers were arrested in Petaluma.

Savano said in a statement that two people were injured in two DUI-related accidents reported by the CHP.