Terrorism is likely motive behind Toronto van attack: U.S. source

WASHINGTON (Reuters) - Investigators are examining terrorism as the likely motive behind a van attack in Toronto that killed nine people on Monday, a U.S. security source said. The source said there was no reason to believe that the incident in which a Ryder rental van plowed into a crowd was an accident. (Reporting by Mark Hosenball; Editing by Eric Beech)