The unidentified ballot box bombing suspect in the Pacific Northwest could strike again, authorities warned. Portland Police Bureau spokesperson Mike Benner told reporters during a Wednesday press brief: "Investigators believe it is very possible the suspect intends to continue these targeted attacks across the area."

Benner described the alleged suspect as a thin-faced white male between the ages of 30 and 40 years old with balding or very short hair, a medium to thin build, and was wearing dark clothing.

Detectives believe the suspect has "a wealth of experience in metal fabrication and welding." Benner told reporters case investigators would be conducting a second press conference later in the evening to provide more detailed information on the alleged suspect.

The briefing came in response to Monday's arson attacks, in which a suspect set fire by igniting incendiary devices to electoral ballot drop boxes in Portland, Oregon, and the neighboring city of Vancouver, Washington, just days before the highly anticipated US Presidential election.

Nearly 500 ballots were burned at the Vancouver bombing site located at Fisher's Landing on 3510 SE 164th Ave, the Clark County Auditor's Office said. Only three ballots were lightly burned at the Portland bombing site, according to Multnomah County election officials, who credited the state's ballot boxes being equipped with dry chemical fire suppressant systems that activate in response to heat.

"It worked exactly as it was supposed to," Oregon Elections Director Tim Scott said. "As soon as there was heat, it discharged the contents and immediately put out the flames." Washington state ballot boxes also are equipped with fire suppressant systems, but it had failed to go off, officials said.

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Authorities have been on the search for a vehicle captured on surveillance video footage near the Portland ballot bombing site. The vehicle has been described as a Volvo S60 from the early 2000s. Police revealed that the vehicle "has places on it that are more matte in color than a standard shiny finish," has a "tan or light grey interior," and is equipped with "an aftermarket grille with a Volvo emblem missing," according to the Portland Police Public Information Officer.

Additionally, the vehicle has dark wheels, an unpainted body trim, and no front license plate, police said.

Sources familiar with the investigation told The New York Times on Tuesday that the incendiary devices used in the bombings allegedly had the message "Free Gaza" emblazoned on them. Authorities also revealed that there was a third similar incident reported in Vancouver, Washington on Oct. 8; however, no ballots were burned in the incident. Police said all three cases are connected.

It has also been revealed that the Department of Homeland Security had released a recent intelligence report warning about the threat of "incendiary devices and explosive materials" being dropped into ballot boxes.