A house fire in Duluth's Central Hillside neighborhood Thursday morning was determined to be intentional.

When the first Duluth Fire Department rig arrived shortly before noon at the structure fire on the 100 block of East Eighth Street, the back end and deck of the home was engulfed in flames, Duluth public information officer Kate Van Daele said.

When crews arrived, they observed the tenants of the house and their dog exiting the structure, according to a news release from the fire department. No one was injured in the fire and preliminary searches located no other occupants.

The fire caused $70,000 in damage to the structure and its contents.

Six rigs responded to the fire due to its size. By 1:30 p.m., the fire was out and crews were boarding up the house and extinguishing hotspots.

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The Duluth Fire Marshal’s Office is investigating the fire.

This story was updated at 2:53 p.m. July 22 with additional information from the Duluth Fire Department. It was originally posted at 2:12 p.m. July 22.