Fears gunmen loose on US college campus

Arkansas State University in the city of Jonesboro is locked down after armed men were reportedly seen on campus.

The university sent an emergency alert shortly before 2pm on Sunday saying the men were seen near the student union. A later message said three men wearing all black were seen and that the lockdown remains in effect until further notice.

ASU and Jonesboro police did not immediately return phone calls for comment.

The lockdown is the second at the school in the last three months ASU.