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(CNN) - Shots that rang out in the Canadian capital Wednesday left a soldier and a gunman dead, a city on lockdown, and a series of questions about security threats facing the nation.
Parliament member Kyle Seeback called it a "horrific day."
And it may not be over yet.
Authorities haven't ruled out the possibility that an additional shooter could be on the loose. And Ottawa Police Constable Chuck Benoit told CNN that there was more than one person involved in the shootings.