WAILUKU, Hawaii (AP) — Authorities in Hawaii have adjusted the number of deaths from the deadly Maui wildfires down to at least 97 people.

Previously officials said they believed at least 115 people had died in the fires, but further testing showed they had multiple DNA samples from some of those who died. The number of those who were missing also fell from 41 to 31.

John Byrd, laboratory director with the Defense POW/MIA Accounting Agency, said during a press conference Friday afternoon that the current number of dead should be considered a minimum, because it’s possible that toll could rise.

Determining the death toll from the Aug. 8 wildfires in Lahaina has been especially complicated because of the damage caused by the fire and the chaos as people tried to escape, officials said. In some cases, animal remains were inadvertently collected along with human remains.

So far, 74 of the deceased have been positively identified, said Maui Police Chief John Pelletier.

The Lahaina fire is the deadliest in the U.S. in more than a century.

Byrd said the initial death tally was too high for several reasons, adding that the lower tally now was the “normal and natural” progression of the long-term forensics investigation.

“We look at body bags that come in and we do an initial inventory and we assess how many people are represented there,” he said. “When you do the first tally of all those that have come in, the number tends to be too high because as you begin to do more analysis and examination you realize that actually you’ve got two bags that were the same person or you have two bags that were the same two people but you didn’t realize that.”

“The numbers start a little too high on the morgue side and eventually settles until at some point it’s going to be a final accurate number. I would say we’re not quite there yet,” Byrd said.