Ahead of potential civil unrest over Tuesday’s presidential election, the National Guard is on standby as a precaution in several states, including Washington and Oregon, where hundreds of ballots were damaged or destroyed after at least three ballot boxes were set on fire recently, officials say.

Washington Governor Jay Inslee address the ballot box goes off on Friday in a press release announcing the National Guard is being placed on standby, saying, “Southwest Washington State has already experienced specific instances of election-related unrest.”

Inslee did not disclose how many troopers will be activated Tuesday, but said they will be available to support law enforcement Monday through Thursday, according to the news release.

In OregonGov. Tina Kotek said in a statement Friday that the National Guard is on standby as political leaders urge peaceful protests, according to CNN affiliate KTVZ.

While “there is no current information to suggest unrest,” Portland Mayor Ted Wheeler said, according to KTVZ, “there is a lot of uncertainty and tension in our community.”

Nevada Gov. Joe Lombardo this week as well announced that 60 National Guard troops are on standby “in preparation for a safe and trouble-free election day.” Lombardo said this reflects the state’s routine preparation for past elections and “is one of many proactive steps the state is taking.”

Preparations are also underway Washington, DCwhere more than 3,000 police officers will work 12-hour shifts, Police Chief Pamela A. Smith said in a press conference Tuesday.

The issue has become more pressing for law enforcement since then the January 6, 2021 insurrection at the US Capitol which delayed the certification of the last presidential election.

CNN’s Chris Boyette, Shimon Prokupecz and Meridith Edwards contributed to this report.