At least two people are injured after an explosion at a Vancouver Island military base on Thursday.
The explosion at Canadian Forces Base Comox shook the nearby civilian terminal of Comox Valley Airport.
A spokesman for the base says the blast appears to have occurred in an unused building next to the Comox Valley Search and Rescue Center.
It is believed that the explosion was fueled by natural gas.
Several ambulances and firefighters were on the scene near an old barracks building that was under renovations and partially collapsed.
A witness inside the civilian airport terminal tells CTV News that the blast threw debris and shook pictures of the walls.
A former sergeant says she was exercising at the basic recreation center when her treadmill was shaken by the force of the explosion.
This is an evolving story. Go back for updates.