Twelve motorists were arrested at drunken driving checkpoints in Petaluma Saturday night and early Sunday, police said.

Two drivers were arrested for driving under the influence, one for driving with a suspended license and nine for driving without a license, Petaluma Police Sgt. Ken Savano said.

The first checkpoint was on westbound East Washington Street at Gray Street from 6 p.m. to 9 p.m Saturday. Officers then moved the operation to cover both directions of Petaluma Boulevard at Oak Street from 10 p.m. to 2:30 a.m.

A total of 1,378 vehicles passed through the two checkpoints, and 1,215 were screened by police for signs of driving under the influence.

Ten vehicles were towed, and eight were impounded for 30 days from unlicensed and suspended drivers, Savano said.

Including the results of a Friday night checkpoint in Petaluma, a total of 4,148 vehicles passed through and eight drivers were arrested for DUI.

Savano said the ratio of arrests to vehicles screened ?seems low,? but the operations ?succeeded in raising the awareness of the dangers of DUI driving for thousands of motorists.?

Funding for the checkpoints is provided by a state grant, Savano said.

?Guy Kovner