Lawrence police arrested two drivers on suspicion of DUI and reported two other drug possession arrests or citations from the department’s most recent special enforcement effort.

Saturday’s DUI saturation patrol put four extra officers on the streets, three in patrol vehicles and one in the department’s Breath Alcohol Testing, or BAT, van as a support vehicle, Officer Shawn Gross said in an email.

The officers stopped 19 motorists for various traffic infractions, resulting in nine citations and six warnings, Gross said.

Of the two DUI arrests, one was a driver with a blood-alcohol level of 0.199, which is over twice the legal limit to drive in Kansas, and one was a person who refused to be tested, Gross said. He said officers also had two drug possession arrests or citations.

Police announced the special enforcement — which took place on April 20, celebrated among marijuana smokers as the 4/20 holiday — several days in advance. According to the department, the effort is funded with a Kansas Department of Transportation grant.