The Ann Arbor Fire Department has yet to determine any leads in the investigation of a fire that engulfed an abandoned building on South University Avenue, more than two weeks ago.

Although fire department officials have ruled out natural causes for the blaze that devastated the former location of Pinball Pete’s, investigators have not identified any suspects.

“We are waiting to see if the police detectives come up with something that would be applicable for us to follow up on,” Fire Marshal Kathleen Chamberlain said.

There is no new information regarding whether the fire was started intentionally.

Chamberlain told the Daily that the Ann Arbor Fire Department and Police Detective’s Unit are cooperative agencies, but work independently with regard to these types of investigations.

“We’re following up on whatever leads (the detectives unit) has,” Chamberlain said. “Sometimes there isn’t much to follow up on — that’s why so many fires are undetermined.”

The fire department said it has exhausted its own investigation and is now waiting on new evidence from the detective unit.

As of 6 p.m. yesterday night, the Ann Arbor Police Department Detective’s Bureau had not returned the Daily’s phone calls regarding the current status of its investigation.

If the detectives don't obtain any leads, the cause of the fire will be ruled undetermined, but the case will remain open.

“Undetermined fires are never really closed out,” Chamberlain said. “You never know when someone might come forward.”

Chamberlain explained that in the event that an arson case goes undetermined, it will remain that way until a witness or suspect brings forth new evidence.

“Arsons are usually built on circumstantial evidence rather than direct evidence,” Chamberlain told the Daily. “They’re very difficult. We process what we have and are waiting to see if anything new comes up.”

Chamberlain urged witnesses to call the fire department or police detectives unit with any additional information they have about the fire.

Chamberlain was quoted in an earlier Daily article saying that fire officials determined the blaze started on a corner of an upper floor of the building, and very quickly had spread through the entire structure.

Neighboring buildings including the apartment complex University Towers and Momo Tea sustained minor damage as a result of the fire.

Momo Tea reopened on Friday after damage to its kitchen forced the business to close for some time.

University Towers was evacuated during the fire for safety purposes, but the 600 displaced tenants were allowed back into their homes within a few hours.