A suspect was arrested Wednesday morning after a package the size of a briefcase was reported inside the Langevin Block, an office building at 80 Wellington St., near Metcalfe Street.
Wellington Street was closed to traffic in both directions from O'Connor to Elgin streets while members of a chemical, biological, radiological, nuclear and explosives (CBRNE) team investigated the package.
RCMP later said the bomb disposal unit determined that the package was not a threat.
The Langevin building is across the street from Parliament Hill and houses the Privy Council offices and Prime Minister Stephen Harper's office.
Mohamoud Jimale, 45, of Toronto, has been charged with one count each of uttering threats and mischief. He was scheduled to appear in court this morning.