Six people, including four children, found dead in a house in Ottawa

According to multiple reports from Ottawa police, six individuals - four children and two adults - have been found dead in a two-story townhouse. One male suspect has been arrested in connection to the incident. The police have stated that there is no ongoing threat to public safety. Canadian authorities are treating the deaths as homicides, with Ottawa police chief Eric Stubbs describing it as a "mass shooting." There seems to be consensus among the sources regarding the number of fatalities and the arrest of one suspect. However, the term used to describe the incident - mass shooting versus multiple homicides - may vary slightly between reports.