Nine people were arrested during a Petaluma DUI Checkpoint. Petaluma Police held the checkpoint Saturday at Petaluma Boulevard North at Gossage Ave between 6:00 p.m. and 1:30 a.m. During the operation, they arrested one driver for DUI and two people for DUI probation violations. Four more people were arrested for outstanding warrants and two were arrested for driving with a suspended or revoked license. Another 18 drivers were cited for driving without a license. Over 900 vehicles were screened.