The FBI and other agencies were investigating Monday after early morning fires were set in ballot drop boxes in Portland, Oregon, and in nearby Vancouver, Washington, where hundreds of ballots were destroyed. The Portland Police Bureau reported that officers and firefighters responded to a fire in one ballot drop box at about 3:30am and determined an incendiary device had been placed inside. Multnomah County Elections Director Tim Scott said a fire suppressant inside the drop box protected nearly all the ballots; only three were damaged, and his office planned to contact those voters to help them obtain replacement ballots.

A few hours later, across the Columbia River in Vancouver, television crews captured footage of smoke pouring out of a ballot box at a transit center. Vancouver is in Washington's 3rd Congressional District, the site of what is expected to be one of the closest US House races in the country, between first-term Democratic Rep. Marie Gluesenkamp Perez and Republican challenger Joe Kent.

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