A suspect in the ballot drop box fires that occurred in Vancouver, Washington, and Portland, Oregon, before Election Day is still unknown.

Newly released surveillance video shows a ballot box being set on fire in Portland, Oregon, last month. The video shows the suspect lighting what appears to be a fuse, then placing it inside the ballot box.

The FBI is offering a $25,000 reward for information on a suspect behind ballot box arsons in the Pacific Northwest ahead of the Nov. 5 election.