A tiny Canadian village remains in lockdown today after two men, who are suspected to be fugitive teenage serial killers, were spotted foraging for food at a landfill.

Native American volunteers spotted the men as part of a week-long manhunt for Kam McLeod, 19, and Bryer Schmegelsky, 18.

Authorities say they believe the two are behind the killings of 23-year-old Australian Lucas Fowler and his 24-year-old American girlfriend, Chynna Deese, who were were found dead on the side of a highway 1,800 miles away in Canada's west on July 15.

Four days later and 292 miles away they allegedly killed University of British Columbia botanist Leonard Dyck. His body was found dead on another highway.

The days-long manhunt, which has crossed half the country, shifted to the area of York Landing, Manitoba, yesterday - about 1,900 miles km from the crime scenes in British Columbia.

The duo were reportedly spotted by members of the Bear Clan Patrol at a landfill, sparking the mass police presence in York Landing - a village with a population of just 443.

Today, Royal Canadian Mounted Police in Manitoba - who had earlier warned of polar bears in the area they were searching - said the 'situation is ongoing'. And claimed 'all possible resources' were being used to apprehend the two suspects.

Police had been concentrating their search in recent days in the harsh terrain in the Gillam, Manitoba, area, more than 620 miles north of Winnipeg, deploying drones, dogs and military help before shifting focus to the village.

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Still on the run: Kam McLeod and Bryer Schmegelsky are being hunted by Canadian police. A tip of a sighting was given to police on Sunday

This map plots the teenagers' movements over the last few days and where the murders took place last week

There were conflicting reports from reporters on the ground that the duo have been captured but police denied they were in custody

RCMP officers make an early morning check off a passenger train in Gillam Sunday, hoping to garner any shred of information which may lead to the whereabouts for murder suspects Kam Mcleod and Bryer Schmegelsky

RCMP Emergency Response Team (ERT) members load up for another day on the ground in the search for the suspected killers on Sunday

The Canadian airforce C-130 which is involved in the aerial search for suspected killers is seen above on Sunday

Police warned of the presence of polar bears in the region, as searches were conducted for the two teenage suspects

Royal Canadian Mounted Police (RCMP) Manitoba confirmed on Sunday they had been sent to York Landing, Manitoba following the tip-offs.

There were conflicting reports the duo have been captured but police denied they were in custody. Locals reported hearing gunfire as authorities moved in on the duo.

At 9.45pm ET Sunday RCMP tweeted: 'Despite reports - there is no one in custody at this time. RCMP officers remain in the community of York Landing & continue to investigate the reported sighting of the two suspects. All required resources are being used in this ongoing investigation. Updates to follow.'

At midnight they tweeted: 'All efforts are being made in York Landing to apprehend two individuals matching the description of the suspects. The safety of community members is our priority. We remind residents to stay inside & check all doors & windows to ensure they are closed & locked.'

York Landing is located along the eastern bank of the Nelson River between Lake Winnipeg and Hudson Bay - statistics show it has a population of 464 and 123 dwellings.

The elected chief of the area York Factory First Nation, Leroy Constant, added in a statement posted to Facebook: 'Police have deployed multiple resources in the area of York Landing, MB and in attempts to apprehend the suspects.

'The (two) suspects are still at large and have NOT been caught. RCMP will remain on scene with Helicopter, Dogs & Emergency Response Team. They will remain until further notice.'

Earlier he wrote: 'Everyone please remain indoors with your doors locked. And all vehicles should be parked. Please share the message with those who don’t have Social Media. We received word that there was a possible sighting around our community landfill moments ago.'

Leroy Constant, the chief of York Factory First Nation, shared this statement above Sunday

The duo were reportedly spotted by members of the Bear Clan Patrol, who are based in the provincial capital of Winnipeg. Search team is seen above Sunday

The search area is seen above on Sunday. The friends have been spotted twice in the extremely remote town of Gillam before today's sighting

Bear Clan Patrol in York Landing are seen above during the search. The duo were reportedly spotted by members of the patrol

The duo were reportedly spotted by members of the Bear Clan Patrol, who are based in the provincial capital of Winnipeg, and have been assisting in the search.

Police have been working up to 20 hours per day searching around the small town of Gillam in northern Manitoba where the boys were sighted last week.

On Saturday a Royal Canadian Air Force Hercules CC-130H Hercules was brought in to assist with the aerial search for the duo.

McLeod and Schmegelsky have been on the run since the bodies of Australian backpacker Lucas Fowler, 23, from Sydney, and his North Carolina girlfriend Chynna Deese, 24, were found dead on the side of a highway 3,000km away in Canada's west on July 15.

Four days later and 470km away they allegedly killed University of British Columbia botanist Leonard Dyck. His body was found dead on another highway.

The duo then drove more than 3,000km east to the province of Manitoba in a stolen RAV 4. They ditched the car they were travelling in and burned it.

The friends have been spotted twice in the extremely remote town of Gillam before today's sighting.

Specialist officers using sniffer dogs, a drone equipped with heat sensors, and helicopters are all engaged in the manhunt.

The airborne search has cast almost 200 miles wide and around 1,000 officers are working the case across the country.

Before today's sighting, RCMP Inspector Kevin Lewis told DailyMail.com: ‘It's probably about a thousand [officers working the case],’ he said.

The manhunt for Kam McLeod, 19, and Bryer Schmegelsky, 18, intensified Sunday with the Royal Canadian Mounted Police (RCMP) Manitoba tweeting of the possible sighting

They ditched the car they were travelling in and burned it. The burn site of the stolen RAV 4 is seen above

Some blackened coins can be seen amongst other metal debris of the burned vehicle

RCMP officers make an early morning check off a passenger train in Gillam as they search for the deadly duo

RCMP Emergency Response Team (ERT) members load up for another day on the ground in the search for the suspected killers

‘Across Canada everybody's engaged where there's sightings and tips and all that, where people call up and they need to be investigated.

‘You have the resources over in BC still investigating, Saskatchewan are still investigating. Everybody's hyper sensitive so they're calling in tips on anybody who remotely looks like these fellas, or anyone who's even suspicious. Everybody's hyper vigilant.’

The inspector added that a Hercules military plane looking for the boys flew around 180 miles up to the town of Churchill on the banks of the Hudson Bay.

‘We had the Herc operating until it went dark,’ said Lewis. ‘It has high powered cameras with police officers and military folks looking down at the earth for anything that resembles a person or boat, or anything of evidentiary value. ‘It could be anywhere from Gillam all the way up to Churchill, even to the Hudson. Anywhere you would go from the Gillam area if you wanted to escape.

RCMP have raised the possibility that they teens escaped the town either on the slow-moving trains that roll across the rural province, or got a ride from an unsuspecting passer-by before news of the manhunt reached Manitoba, though they have no sightings or evidence to confirm the suspicion.

The bodies of Lucas Fowler, 24, and Chynna Deese, 23, (pictured) were found in British Columbia

The duo are also accused of murdering University of British Columbia botanist Leonard Dyck (pictured) in BC before driving more than 3,000km to Manitoba

This is the remote part of Manitoba in Canada where Bryer Schmegelsky and Kam McLeod have been spotted

‘Obviously if you're coming to the end of the road at Gillam, your plan shouldn't be to go back to Gillam, right? It should be to go up, keep going,’ said Lewis.

‘We're going to have the Herc back up today. We're doing some scans over northern Manitoba again, and we're going to be continuing checking the trails again.’ Police have almost completed their door-to-door interviews of Gillam residents, but say that the exhaustive trawl has so far proved fruitless.

‘We've spoken with about three-quarters of the occupants so far, and all the big places were checked,’ the inspector told DailyMail.com.

‘Now it's just following up the people who aren't home, to see if there's anything they can add.’

The inspector said despite the gruelling hours, police spirits were still high.

‘It’s just go, go, go until the day is done. Some of the folks are going for 16 hours, some for 20,’ he said.

‘Morale is good. Things are positive, everyone’s still smiling. Everybody’s hopeful and excited to be a part of this, because there’s such a national attention. Everybody wants to get the bad guys.’