According to http://www.cbc.ca, one man has been shot and killed inside Parliament, after an assailant with a rifle shot a soldier standing guard at the War Memorial in downtown Ottawa.
Police and witnesses are reporting more shots at other locations surrounding Parliament Hill.
It was not immediately known if there were further injuries.
Alain Merisier, who works at the cafeteria in the Parliament building, told CBC News that said he saw a man in a vehicle with a long gun.
Witnesses said they then heard shots fired, and there was an unconfirmed report of a person injured outside the Library of Parliament.
Police confirmed the shooting at the War Memorial, and sealed off the area while the injured soldier was given emergency medical aid. He was later put into an ambulance.
"We were waiting there for a city tour and suddenly I heard four shots," said Jan Luchtenburg, a tourist visiting downtown Ottawa from Holland.
"Suddenly I saw a small guy with long black hair... with a long rifle, and he ran away after the shots, across streets in the direction of Parliament Hill," he said.
"Then I saw one of the other armed forces guys just running. He barrelled over, just ran right over. The other guy just dropped. I looked back and just dived underneath and immediately called 911."
The National War Memorial stands in Confederation Square in the heart of downtown Ottawa. The Parliament buildings are to the northeast.
Scott Walsh, who was working on Parliament Hill, said he saw a man running with a double-barrelled shotgun, wearing a scarf and blue jeans.
COMMENT: Walsh said the man hopped over the stone fence that surrounds Parliament Hill, with his gun forcing someone out of their car. He then drove to the front doors of Parliament and fired at least two shots, Walsh said.
Cabinet ministers, MPs and journalists in the buildings housing the House of Commons and Senate were in lockdown as police tracked the gunman.
The Prime Minister's Office says Stephen Harper is safe and not on Parliament Hill. Opposition Leader Tom Mulcair and Liberal Leader Justin Trudeau are also reported safe.
Police are still searching for the gunman, and have sealed off the area, moving bystanders and reporters to the nearby Chateau Laurier Hotel. Other witnesses were taken to the city's police headquarters.
New Democrat MP Hélène Laverdière said she heard 20 to 30 shots, and hit the floor. She and fellow MPs Charlie Angus and Rosane Doré Lefebvre were later led out of the Center Block to safety.
Doré Lefebvre said she was worried about getting her daughter from the daycare facility on Parliament Hill.
This report will be updated as new information becomes available.