A county in southwestern Colorado is moving polling places out of public schools, in part because of safety concerns since the Columbine High School massacre.

Officials in Montezuma County worried about allowing unsupervised adults into schools to vote, said Deputy County Clerk Carol Tullis.

“What with all the issues of school safety, we decided to pull the precinct polling places out,” she said.

In February, police detained three teens outside Ignacio High School, 55 miles east of Cortez, after discovering several guns, one of them loaded, in their vehicle. The youths said they had the guns for protection and had no intention of attacking the school.

At Columbine, two teen-agers killed 12 students and a teacher before committing suicide last April.

The Columbine school district, in Jefferson County, has no plans to end voting at schools but was considering increasing security at school polling sites for the March 10 presidential primary, said district spokesman Rick Kaufman.

Ed Arcuri, a spokesman for the secretary of state’s elections division, said he wasn’t aware of any moves elsewhere in Colorado to move voting booths out of schools.