Villanova University in Pennsylvania issued an active shooter alert on August 21, 2025, prompting students and faculty to lock and barricade doors and move to secure locations. The warning specifically advised individuals to avoid Scarpa Hall at the university's law school. The Radnor Police Department responded promptly to the report of an active shooter on campus, which occurred days before the start of classes. Authorities instructed students to shelter in place while police were on the scene investigating the situation near Philadelphia. The university communicated the alert through multiple channels to ensure campus safety during the ongoing police response.