Three Virginia Beach schools are using a new security system that scans parents’ and visitors’ identification cards and checks them against a national database of registered sex offenders.

School officials tell The Virginian-Pilot that the city school division paid $5,100 to install the Raptor Technologies system at Princess Anne High School, Larkspur Middle School and Birdneck Elementary School.

The monitoring program will cost an additional $432 a year at each school. If the trial period is successful, district officials will consider expanding the registry checks to all city schools.

Some parents and civil-liberties advocates say the scans and checks go too far, and are a disproportionate response to an exaggerated threat.

Texas-based Raptor Technologies says it has installed its systems in thousands of schools nationwide.