However, she added autopsies were pending and she could not comment on their cause of death.
"To ensure the integrity of the investigation, no further information about the items will be provided at this time".
They release composite sketches of a man seen speaking with the couple on the highway where they were found dead and a sketch of the unidentified man found dead near the burned truck.
Police discovered Leonard Dyck's body several days after Deese and Fowler and it was only a few kilometres from where the two suspects had abandoned their burning auto.
"This was really hard search territory".
McLeod and Schmelgsky are suspected of embarking on a murderous highway rampage in the western Canadian province of British Columbia last month that left Australian tourist Lucas Fowler, his U.S. girlfriend Chynna Deese and botanist Leonard Dyck dead.
The RCMP have not determined exactly how Kam McLeod and Bryer Schmegelsky died.
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McLeod and Schmegelsky themselves were originally considered missing persons and only became suspects later.
July 23 - RCMP announce Schmegelsky and McLeod are suspects in the three deaths.
Tips about possible sightings of the young men have poured into police across the country.
Five members of the federal Underwater Recovery Team were sent to Gillam in northern Manitoba to conduct a "thorough underwater search" in the area, the RCMP said. At the time, police issued an alert that the boys may have changed their appearance and "inadvertently been given assistance to leave the area by someone that was not aware of who they were". Police have used sniffer dogs and an RCMP helicopter equipped with an infrared camera.
"Following this discovery, we were, at last, able to narrow down the search".
Investigators have recently focused their efforts in Manitoba after another vehicle authorities believe the teens had been driving was found burnt out in a rural area near Gilliam, Assistant Commissioner Jane MacLatchy said in a statement.
"There was significant evidence that linked our suspects to both crime scenes", he said.