Tempe police and other agencies arrested nearly 400 people on the first weekend of the Safe and Sober campaign.
Officers focused on underage drinking and other alcohol-related crimes, increased patrols, DUI enforcement and liquor-law inspections for bars and liquor stores.
146 people were charged with driving under the influence and 112 underage drinkers were arrested. More than a hundred others were arrested for other violations.
The campaign will continue through Sept. 6.
