Canada murder hunt: military join search as suspect's mother pleads for safe ending

Police being given military air support as authorities scour areas of Manitoba for teenage murder suspects

Canada's armed forces have been drafted in to provide air support as police go door to door in the search for two teenagers suspected in three killings in the country's remote wilderness.

Authorities have urged "all Canadians" to be on the lookout for 19-year-old Kam McLeod and 18-year-old Bryer Schmegelsky, after the fatal shooting of a tourist couple - American woman Chynna Deese, 24, and her Australian boyfriend Lucas Fowler, 23 - and the murder of Vancouver professor Leonard Dyck, 64.