James Madison Academic Campus in Milwaukee, Wisconsin is on lockdown after police received a report of a man with a gun being on campus, reports The Journal Sentinel.
The school is located on West Florist Avenue and North 84th Street on the northwest side of Milwaukee.
This is a breaking story so please stay tuned for updates.
Here's what we know so far:
1. Police have not said if the gunman is inside the school.
2. WISN reports that the school's principal received a threatening phone call against the school.
3. This is not being treated as an "active-shooter" situation. Fox 6 reports that police are trying to determine if this is a hoax or a legitimate threat.
4. Police are searching the school room-to-room to ensure the safety of staff and students.
Developing: James Madison principal says everyone is calm as police search classrooms for unspecified threat. School remains on lockdown.
— WISN 12 News (@WISN12News) December 6, 2013
5. The school are referred to as the "Madison Knights." Their motto is "Respectful. Responsible. Safe."