Attorney General Roy Cooper vowed Monday to keep pressuring lawmakers to approve legislation that will require minors to get parental permission before using and other social networking Web sites.

Cooper, along with top law enforcement officials in other states, said the sites provide sexual predators easy access to children and teenagers because people of any age can join. North Carolina legislators failed to pass a bill this year targeting such sites, as some House members and Internet commerce groups said a broad restriction would be unworkable and unconstitutional.