Nova Scotia RCMP are now getting help from officers in New Brunswick and Ontario as they continue to investigate the disappearance of young siblings Lilly and Jack Sullivan in Pictou County.

Lilly, 6, and Jack, aged 4, disappeared from their home in Lansdowne Station on May 2.

An intensive, six-day search on the ground and from the air yielded a footprint but little else to indicate where they might be. There have been further intermittent searches since then.

RCMP said in an update Wednesday that the investigation is still ongoing under the Missing Persons Act.

They said they’re also working with the National Centre for Missing Persons, the Canadian Centre for Child Protection and provincial and municipal police forces across the province and in other parts of the country.

Cpl. Carlie McCann told reporters Wednesday afternoon that the help from other RCMP units and agencies in other provinces or areas includes those that are conducting interviews with witnesses.

Police said they have received about 5,000 video files from Lansdowne Station and surrounding areas after making a public appeal for them and are still reviewing those.

“Early on in the investigation the major crimes unit and other investigators started reaching out to people who live in the area to submit video they may have from surveillance cameras, trail cams, and doorbell cameras,” McCann said. “We did a further request for information in a news release… There was a significant outreach from the community who did want to make video available.”

They are also assessing more than 600 tips from the public and have now interviewed more than 60 people.

A forensic test has been conducted on a blanket found on Lansdowne Road, and investigators have been applying for warrants to seize and examine materials and devices that may be helpful to the case.

McCann said she can’t give specifics on what those other materials and devices are.

Asked if police are still investigating the possibility that the children are still alive, McCann said that “all avenues are being investigated right now.”

“Right now, there are more than 800 tasks associated to this investigation,” Staff-Sgt. Rob McCamon, said in a release issued earlier in the day.

McCamon is in charge of the RCMP’s Major Crime and Behavioural Sciences unit.

“A tremendous amount of careful, deliberate investigative work is underway by people here at home and in other parts of Canada,” McCamon said. “Our collective efforts will continue every day until we determine with certainty the circumstances surrounding Lilly and Jack’s disappearance.”