From the NHL:
The game between the Toronto Maple Leafs and Ottawa Senators, scheduled for tonight at Canadian Tire Centre in Ottawa, has been postponed, the National Hockey League announced today.
The date and time of the rescheduled game will be announced at a later date.
The National Hockey League wishes to express its sympathy and prayers to all affected by the tragic events in Ottawa.
The latest on the situation in Ottawa, from NBC News:
A soldier guarding the National War Memorial was shot and reported killed Wednesday in the Canadian capital of Ottawa, and dozens of shots were fired minutes later in the halls of Parliament, witnesses and authorities said. Lawmakers barricaded themselves in their offices for safety
Authorities said that one gunman was shot by security forces and at least one was on the loose. Prime Minister Stephen Harper was safely escorted from the scene, his spokesman said.