PITTSBURG — Firefighters responded shortly after 7:30 a.m. Friday to a house fire at 406 W. 5th St. that appears to have been a possible case of arson.

Aside from the Pittsburg Fire Department, agencies soon on the scene of the fire near the intersection of 5th and Olive streets included the Pittsburg Police Department, and the Crawford County Sheriff’s Office and Emergency Medical Services, with a total of at least nine vehicles and 14 personnel.

The house, which had at some point been converted to a triplex, was unoccupied and there were no injuries reported to anyone at the scene of the blaze, including first responders, Fire Chief Mike Simons said. There was heavy damage to a first floor kitchen area and smoke damage throughout the building. No utilities were turned on at the house.

“With no utilities, that rules out a lot of stuff,” Simons said.

Though the cause of the fire is still under investigation, it is being investigated as “incendiary” Simons said, which “basically means it’s intentionally set,” he said.

No additional information on potential suspects or evidence of criminal activity possibly found at the house has been released. Investigators were still at the scene of the fire shortly before noon Friday, and the full investigation is expected to take some time.

“It really truly is a joint investigation,” between the Office of the State Fire Marshal and the Pittsburg police and fire departments, Simons said.