The Ontario Fire Marshal's office says the cause of the fire that destroyed CTV Ottawa's studios on Merivale Road may never be known.
Fire swept through the newsroom early on Feb. 7. Investigators say the damage was so extensive, they could not find the fire's point of origin.
CTV was forced to re-locate its operations to the Byward Market, where the company plans to stay.
The fire marshal says it's not unusual for a fire to have an "undetermined" cause.
