Updated

Students on some Pennsylvania college campuses might be carrying more than their books.

At least five state-owned universities are now allowing guns onto campus after students complained they weren't permitted to pack their firearm and a legal analysis by state lawyers concluded an outright ban on weapons was likely unconstitutional.

The universities have all changed their policies over the past year to reflect the advice of lawyers in the governor's office and the Pennsylvania State System of Higher Education.

The National Conference of State Legislatures says Pennsylvania and 22 other states leave the issue up to individual colleges and universities.

But state system officials appear to be having second thoughts, telling all 14 member schools on Friday to hold off on any new policy changes while it re-examines the issue.