Police are hunting for more suspects after a soldier was shot dead and the suspected gunman also shot dead in the Canadian parliament during several shooting attacks in the city.
Police can be seen running up stairs and people running through corridors in new footage from within the parliament building filmed during the attack in Ottawa.
The attack in Ottawa came just 24 hours after Canada raised the level of its terrorism alert for the first time.
Security experts in Canada are still cautious about what lies behind today's events.
ITV News International Affairs Editor Rageh Omaar reports:
A nine-year-old boy and a 44-year-old man have been killed, while an 11-year-old boy is fighting for his life, after a house fire in South Yorkshire.
Firefighters were alerted to a serious blaze at the home in Tennyson Close in Penistone, near Barnsley, at around 6.30pm.
South Yorkshire Fire and Rescue said the thoughts of the department were with the victims' family and confirmed it will resume an investigation into the cause of the fire tomorrow.
Ukip will land a second voice in Parliament next month according to a new poll that puts the party a commanding 13 points ahead of the Conservatives in the run up to the Rochester and Strood by-election.
A ComRes study tips the Eurosceptics to get 43% of the vote, well ahead of the Conservatives on 30%, as Tory defector Mark Reckless bids to regain his former seat for Nigel Farage's party.
Labour trailed in third on 21%, while the Liberal Democrats were way back on 3% alongside the Greens ahead of the November 20 poll.
ComRes interviewed 1,500 adults in the north Kent constituency by telephone between October 17-21.
The soldier killed at the National War Memorial in Ottawa has been named as Cpl Nathan Cirillo, by Canadian broadcaster CBC.
The 24-year-old reservist was serving in the Argyll and Sutherland Highlanders of Canada regiment.
The man police are investigating as the possible suspect in the Ottawa shootings, Michael Zehaf-Bibeau, is believed to have been a Canadian convert to Islam.
Two US officials told Reuters that US agencies have been advised that the shooter was a Canadian convert to Islam. One of the officials said that the man was from Quebec.
He is believed to have also been known as Michael Joseph Hall.
Three witnesses describe seeing the gunman move through Ottawa earlier today.
One witness said he saw the man open fire on the soldier at the War Memorial: "A guy came from the side, my left hand side and came over with the rifle and shot at the man, then the guy went falling down and everybody was just in shock."
A second man says he heard gunshots before seeing crowds "screaming and running" before he saw a man with scarf over his face with "a double barreled shotgun."
Canadian police are investigating Michael Zehaf-Bibeau as a possible suspect in the Ottawa shooting, a source familiar with the matter has told Reuters.