What to know about ballot box fires in Washington and Oregon

• "Make no mistake, an attack on a ballot box is an attack on our democracy and completely unacceptable," Oregon Secretary of State LaVonne Griffin-Valade said in a statement.

State of play: The burned boxes were in the greater Portland area, and officials took steps to remedy the situation and prevent future risk.

• No one has been arrested in connection to the incidents, but law enforcement is looking for a white male who is "highly knowledgeable in both metal fabrication and welding" between the ages of 30 and 40, according to a statement.
• The Portland Police Bureau said officers responded to the scene of a fire around 3:30 a.m. Monday, where they found "an incendiary device" used to start the fire. In that incident, only three ballots were damaged.
• In nearby Vancouver, Washington, law enforcement responded to the second fire that damaged hundreds of ballots.

Fire suppression technology was installed in Clark County drop boxes, Kimsey said at a press conference Monday, but, it "doesn't appear it worked very well."

• Washington State Democratic Party chair Shasti Conrad recommended all voters who dropped their ballots off after 11 a.m. Saturday at the drop box that was targeted check the status of their ballot.

The latest: As of Tuesday, 345 of voters whose damaged ballots were identified in the Vancouver drop box had already requested replacement ballots, officials say. The 143 others will be mailed ballots Thursday.

• Elections office employees in the county will now serve as observers 24 hours a day at the county's 22 drop boxes to report suspicious activity. Officials have also increased the frequency of ballot pickups and heightened police patrols around the boxes.

The FBI's Portland Office confirmed Monday it was investigating both incidents "to determine who is responsible."

• Local police said the fires appear to be "very similar" to a third separate incident that also occurred earlier this month.

In Phoenix, a suspect was arrested in connection with an unrelated mailbox fire at a United States Postal Service location earlier this month.

• Officials say his motivation was not political.

The big picture: As disinformation about election security spreads, intelligence agencies have warned of very real threats posed by domestic extremists fueled by election-related conspiracy theories.

• In a Joint Intelligence Bulletin reported on by NBC News, FBI and Homeland Security officials warned that domestic actors looking to disrupt the vote pose a threat to the election and inauguration.
• In a DHS bulletin obtained by watchdog group Property of the People, officials warned that some social media users were discussing ways to sabotage ballot drop boxes.

According to the bulletin, some "domestic violent extremists" have suggested fireworks, road flares, chemicals and other tools could be used to damage ballots.

• Ballot drop boxes were named as a specific area that could see attacks or violence, NBC reported.

Intelligence officials have warned that election workers could face heightened threats, exacerbated by false narratives spread during the 2020 election.

• The Justice Department has investigated dozens of reports of threats against election workers across the country, several of which have resulted in criminal charges.

Flashback: Last month, election officials in at least 15 states were targeted with suspicious packages and multiple secretaries of state reported being sent letters containing white powder.

Go deeper: America's new election shields: panic buttons, bulletproof glass

Editor's note: The story has been updated with comment from the FBI, local and state officials and additional developments.