With just days until Election Day, investigators in Oregon have shared new details about a man they say is responsible for three recent fires at ballot drop boxes which damaged hundreds of ballots – and are warning he may continue his attacks.

Investigators have not identified the suspect, Portland Police Chief Bob Day said Wednesday, but police have released a physical description and other information. Police did not reveal the source of the description.

“In terms of anticipating future behavior, that’s a speculation,” the chief said. “That’s just what we have to anticipate. It would be really naive of us or unjust for us to say that ‘hey, it’s all taken care of,’ and we don’t have him in custody.”

Here’s what authorities have said about the person they are looking for:

Day told reporters they have to “anticipate” the suspect will attack again, and security has been stepped up at the approximately 30 ballot boxes in Portland.

Fires were set at three ballot boxes in the area in the past three weeks. An “incendiary device” found attached to the side of a ballot drop box in Portland, early Monday damaged ballots, but most were unaffected because of fire suppressant installed in the ballot box. Another fire was set at a ballot box in Vancouver, Washington, the same day.

Officials have identified 488 damaged ballots that were retrieved from the burned ballot box in Vancouver, just across the Columbia River from Portland, and 345 of those voters already requested new ballots, according to election officials.

Elections staff will mail another 143 replacement ballots to voters Thursday, officials said on X. Workers were unable to identify six of the damaged ballots. Other ballots may have been completely burned to ash, and therefore, unidentifiable, Clark County officials said in a news release Wednesday.

Investigators have also linked the two most recent incidents to a third ballot box fire on October 8, also in Vancouver.

As Election Day nears, state leaders are encouraging citizens to vote despite the incidents, pledging increased security around the drop boxes.