Police said a potential footprint was spotted as the search for two missing siblings in Canada’s Nova Scotia province continues.

Lily Sullivan, 6, and Jack Sullivan, 4, were last seen Friday on Gairloch Road in Lansdowne Station, Pictou County. The children are believed to have wandered from a home just after 10 a.m., the Royal Canadian Mounted Police (RCMP) said in a news release.

Police told CBC News that searchers located what could have been a footprint on Saturday, leading them to expand their search efforts in that area.

“Since Lily and Jack Sullivan were reported missing on Friday, ground search and rescue volunteers and officers have meticulously searched the kilometres in the area around Lansdowne Station where Lily and Jack last seen,” RCMP told Newsweek. “Searchers are diligently keeping track of which specific sections of the ground have been covered and are applying their specialized skills to allow the searchers [on] scene to stay safe.”

The search effort for Lily and Jack is now in its fourth day. Multiple agencies are participating, including search and rescue teams from around the province, the Civil Air Search and Rescue Association, the Department of Natural Resources Air Services, RCMP Police Dog Services and RCMP Remotely Piloted Aircraft Systems operators.

About 160 people were involved in Sunday’s search despite rain forecast in the area, CBC reported.

What To Know

Lily is described as having shoulder-length light brown hair with bangs. She might be wearing a pink sweater, pink pants and pink boots.

Jack is described as having short blondish hair. Police said he is wearing blue dinosaur boots, and no other clothing description is available.

A vulnerable missing person alert has been issued for the children.

“Police and others involved in the search appreciate the ongoing community support across the province related to this missing person investigation,” the RCMP said.

Officials are asking the public to avoid the search area to allow trained searchers to do their work. Police added that the family is receiving updates on the search efforts.

RCMP asked the public to “spread the word through social media respectfully.”

What People Are Saying

RCMP spokesperson Corporal Carlie McCann, to reporters on Monday: “It has been a few days, but that has not dampened the hopes of the [search] teams and the police who are here trying to get these kids home.”

Robert Parker, warden of the Municipality of Pictou County, told CBC News: “They often say it takes a village to raise a child. Well, all of Pictou County is a village right now and everybody is hoping and praying these little ones are going to be found.”