Police in the states of Oregon and Washington are investigating the burning of several ballot boxes, which contained hundreds of already filled-in ballots.
The Portland, Oregon, police department said it opened an investigation after discovering, overnight, "an incendiary device inside a ballot box in the Central City district."
However, Multnomah County Elections Director Tim Scott said only three ballots were affected.
A similar event was reported shortly after in Vancouver, Washington State.
To date, no arrests or identification of the perpetrators have been reported.
But on October 24, in a similar event, two people were arrested and accused of setting fire to boxes with early voting ballots in different suburbs of the Phoenix metropolitan area, in the State of Arizona.
Maricopa County, the most populous in Arizona, is decisive in determining who wins this state, where the vice president and Democratic candidate, Kamala Harris, and the Republican candidate, Donald Trump, are practically tied.
