Ten people, including the suspected shooter, have been killed in a mass shooting at a secondary school in the Canadian town of Tumbler Ridge, in the western province of British Columbia, according to police and media reports.

The Royal Canadian Mounted Police (RCMP) said six victims were found dead inside Tumbler Ridge Secondary School.

One person died while being transported to the hospital, and two others were discovered dead at a residence in the community, believed to be connected to the incident.

Police said the suspect was also found dead inside the school from what they described as a self-inflicted injury.

Two people were airlifted to the hospital with serious or life-threatening injuries, while about 25 others were assessed for injuries at the medical centre, RCMP said.

Authorities initially ordered residents in Tumbler Ridge and surrounding areas to shelter in place, but the order was lifted later in the evening after police said there was no ongoing risk to the public.

Police said they do not believe there are any additional suspects, but officers are continuing searches of homes and properties in the area to identify anyone else who may be injured or linked to the incident.

Additional RCMP officers, including members of the Major Crime Unit, have been deployed to the community to assist with the investigation.

The RCMP said they are working closely with the local school district to ensure students are reunited with their parents and guardians.