Police say 18-year-old Jesse Van Rootselaar, who had suffered mental health problems, killed her mother and stepbrother on Tuesday before shooting a teacher and five young students at the local school.

Van Rootselaar, who police say was born a male but began identifying as a woman six years ago, then died by suicide.

“At the invitation of the Mayor of Tumbler Ridge, the Prime Minister will be travelling to the community on February 13th to attend a vigil in memory of the victims of this week’s tragic shootings,” his office said in a statement.

Carney, it added, had invited the leaders of all other political parties to join him.

Across Tumbler Ridge, a town of around 2,400 in the Canadian Rockies, flowers and stuffed animals could be seen at unofficial public memorials.

“Hold your kids tight, tell them you love them every day. You never know,” a tearful Lance Young, father of 12-year-old victim Kylie Smith, told reporters on Wednesday.

Police, who say they still do not have a motive, held a meeting with provincial officials late on Wednesday.

“They are working very hard - they recognize the public does need to hear information to fill that vacuum,” local provincial legislator Larry Neufeld told CBC News on Thursday.

Police said they had visited Van Rootselaar’s house on several occasions to address mental health issues and had twice taken her away for formal assessments.

British Columbia Premier David Eby said on Wednesday he had reached out to local health officials to ask for more details of the interactions.

At one point, police seized guns from the house but returned them after the owner, whose identity they did not disclose, successfully appealed the decision.

British Columbia on Thursday observed an official day of mourning.

Provincial lieutenant-governor Wendy Cocchia, the personal representative of King Charles, Canada’s head of state, is due to give a speech in the legislature honouring the victims.