Update: 2:30 p.m.
Police have concluded their search of the Tupper Building. Nothing suspicious has been found.
The Tupper Building, Tupper Link, Clinical Research Centre, and Life Sciences Research Institute have now re-opened, with card access only for the remainder of the day. The Collaborative Health Education Building is open with general access.
The safety and security of our students, staff and faculty remains our highest priority. Should anyone notice any suspicious activity upon returning to the Carleton campus buildings, please notify Dal Security (902-494-4109, or "4109" from any campus phone or payphone) or Halifax Regional Police immediately.