OTTAWA -- Museoparc Vanier is vowing to rebuild the popular Sugar Shack in the heart of Vanier after it was badly damaged in an early morning fire.

Ottawa Fire responded to a 911 call just before 6 a.m. reporting smoke and flames visible in the forest behind the Centre Richelieu-Vanier. The caller confirmed that the Vanier Sugar Shack was on fire.

When firefighters arrived on scene, flames were coming through the roof and a section of the roof structure had collapsed.

No injuries have been reported.

An Ottawa Fire investigator was on scene Thursday morning to determine the cause of the fire. The Ottawa Police Arson Unit is assisting the investigation into the fire.

"Our fire investigator did determine in this case that the fire first started outside of the building," said Carson Tharris, Ottawa Fire Public Information Officer.

In a message on Facebook, Vanier Museoparc said, "your thoughts and kind words mean a lot to all of us. The Museoparc team is humbled and grateful for the community support and to the first responders for their hard work."

Museoparc Director General Jean Malavoy vows the Sugar Shack will open again.

"We're going to tear it down and rebuild the Sugar Shack. That's our plan!"

Ottawa Fire shared photos of crew members trying to contain the blaze, which had broken through the roof.

Ottawa Mayor Jim Watson reacted to the news on Twitter, calling the fire "sad and disturbing" while pledging the city would offer assitance for repair or rebuilding efforts.