Los Angeles: The two teenagers suspected of fatally shooting Australian tourist Lucas Fowler and his American girlfriend Chynna Deese on a Canadian highway rampage left a "last will and testament" video message.

Kam McLeod, 19, and Bryer Schmegelsky, 18, recorded the video message on their mobile phones before taking their own lives in remote bushland in northern Manitoba, the Toronto Star reported on Monday.

Kam McLeod, 19, and Bryer Schmegelsky, 18, have left a final video message.

About 30 seconds of the video was shared with family members of the former fugitives.

McLeod and Schmegelsky said goodbye to their families in the video and described their wishes for their remains, according to a family member interviewed by the Star. It is not known if Schmegelsky was alive on his 19th birthday on August 8.