Police visited home of Tumbler Ridge suspect multiple times over mental health concerns

Canadian authorities seized firearms from the residence approximately two years ago but later returned them

Police have said they were called on multiple occasions to the home of the teenage suspect behind one of Canada's deadliest school shootings after concerns were raised regarding mental health problems and weapons.

Six people, including a teacher and five children, were killed in a school shooting on Tuesday in the western Canadian town of Tumbler Ridge. About 25 other people were injured and two of them remain in critical but stable condition.