Texas A&M University officials say they have received a campus-wide bomb threat and are evacuating all students, faculty and staff.

The evacuation order was posted on the university’s website Friday as a “Code Maroon” warning. It directs those on campus to evacuate by foot immediately and to not use a vehicle.

Texas A&M spokesman Lane Stephenson says the the school received a call about the bomb threat at about 11:30 a.m. He didn’t immediately have any other information about the threat.

The school says all classes were canceled and the evacuation will remain in effect until further notice.