Six people found dead in a house in Barrhaven, south of Ottawa, Canada. Two adults and four children found dead, police say.
One suspect has already been arrested, according to a source. Police believe it is not a question of domestic violence, but of 'tragic investigation' The city's mayor described this tragedy as 'one of the most shocking incidents of violence in the history of our city' and said he was 'devastated' by the news of the deaths.