Villanova University issued an emergency alert for an active shooter on its suburban Philadelphia campus late Thursday afternoon, ordering students, faculty and nearby residents to shelter in place. The notification, circulated around 4:30 p.m. local time, directed the campus community to lock and barricade doors and to avoid the vicinity of John F. Scarpa Hall at the law school. Radnor Township police said they were on the scene, joined by Pennsylvania State Police and federal agencies, as they searched buildings and grounds. Governor Josh Shapiro confirmed that state and federal law-enforcement officers were assisting local authorities and urged the public to steer clear of the area. The incident occurred during new-student orientation and just four days before classes are scheduled to begin. Authorities have not released information on casualties or a suspect, and the university said updates would follow as the investigation continues.