A Wednesday morning structure fire that chased one man from his home on Ottawa’s south side was accidental, the Ottawa Fire Department reported Thursday.

“After conducting an investigation, the cause of the fire was determined to be unintentional improper disposal of smoking material,” Tim Matthias, Ottawa fire chief, said in the report.

Firefighters responded at 10:16 a.m. to 813 S. Locust St. and extinguished the fire, which caused an estimated $65,000 damage to the home and its contents, according to the report.

“One adult male was home at the time of the fire,” Matthias said. “He exited the home prior to our arrival on scene.”

The occupant was unharmed and no firefighters were injured, Matthias said, but “unfortunately, a family pet (dog) perished in the fire.”

Extensive fire, heat, smoke and water damage occurred throughout the inside of the structure, according to the report.

“We did what we could,” Matthias said at the scene Wednesday. “From just peeking in the window, it’s probably going to be a total loss interior-wise.”

American Red Cross was notified to provide emergency assistance for the homeowner, he said.