An investigation continues into three suspicious fires that occurred last month in Port Orchard and South Kitsap, according to Kitsap County Fire Marshall Dave Lyman.

Lyman said his office is conducting interviews with people who were on the top floor of two-story Port Orchard building when a fire started on July 11. The top-level apartment was above the former Los Cabos restaurant at the corner of Bay Street and Fredrick Avenue.

“We believe a fire did start in a bedroom on the southwest corner of the apartment,” Lyman said.

He said his office did not identify an accidental cause for the blaze.

Lyman said material from the fire was sent to the crime lab, but is awaiting results.

“It may take weeks or months, or even longer to get results back,” he said.

The fire, which happened about 8 p.m., started in the apartment’s main entryway.

About eight hours after the downtown fire, another one erupted in the west end of Division Street. It destroyed a 26-foot motorhome, boat and trailer, and camping trailer.

“We believe that fire was due to arson,” Lyman said. “We also submitted materials to the crime lab and we expect we’ll find accelerants were there.”

Port Orchard police have been working with the Fire Marshall’s Office on the Bay and Division street fires.

“We are continuing to interview some people involved with the fire,” Lyman said.

A July 20 fire partially destroyed a vacant South Kitsap modular home near the intersection of Bethel Avenue and Pine Road.

Lyman said material from the fire will be submitted to the crime lab and deputies have another lead they are looking into.

Lyman said none of the fires are connected.

Anyone who has information about the fires can leave their name and phone number at 360-337-4442.