Facilities Services and the Office of Public Safety activated the “local” alarms on the exterior doors. The alarms will sound when the doors are in card reader control (aka “locked”) but they haven’t shut all the way. There will be a local alarm sounding from an enunciator in the ceiling right above the doors. This is only for the exterior set of front doors, not the interior set.
So, if you notice such an alarm, make sure all the doors are pulled shut and it should stop.