Sonoma County authorities arrested seven people Saturday night as part of a stepped-up holiday drunken-driving enforcement campaign.

Two of the people were arrested during probation compliance checks associated with drunken-driving convictions, said Petaluma police Sgt. Ken Savano, who heads the countywide DUI task force known as Avoid the 13.

Savano said officers attempted to check on 47 people. Three were in violation but only the two were arrested, he said.

Another five people were arrested in traffic stops. A total of 79 vehicles were stopped and 30 people were given field sobriety tests, Savano said.

One of the arrests was a parole violation, Savano said.

The task force has been provided by a grant from the California Office of Traffic Safety through the National Highway Traffic Safety Administration.