There was a scare for students and staff at Carleton University this morning.
A tweet was posted yesterday directed at Carleton University, threatening an attack that would take "many lives".
But after investigation and a joint effort between Ottawa Police and the Carleton Safety unit, Ottawa Police say the campus is safe and still open to the public.
Police say the threat came from across the border in the United States.
Intelligence agencies have now taken over and are continuing the investigation.
Ottawa Police urge any on Carleton's campus to report anything they may find suspicious.