Suspicious packages were sent to election offices in more than 20 states this week, prompting FBI investigations, triggering evacuations and unsettling staff, according to a CNN survey of state election offices and an Associated Press report.

The threatening envelopes arrived as election officials across the country prepare for Saturday’s deadline to mail the first ballots to overseas voters and military personnel. States are still weeks away from allowing widespread in-person and mail-in voting.

According to reports from CNN and AP, suspicious envelopes were received by election officials or intercepted en route to officials in Alaska, Arizona, California, Colorado, Connecticut, Georgia, Indiana, Iowa, Kansas, Kentucky, Massachusetts, Mississippi, Missouri, Nebraska, New York, North Carolina, Ohio, Oklahoma, Rhode Island, Tennessee and Wyoming.

Georgia Secretary of State Brad Raffensperger said Thursday his office had been notified by the U.S. Postal Service that a suspicious package was “on its way to us.” The Postal Service will attempt to intercept it, just as it did last November when an envelope containing fentanyl was sent to a Fulton County election office.

“We’re on the lookout for it, and so are they,” Raffensperger said of the package.

What other election officials say: Karen Brinson Bell, executive director of the North Carolina State Board of Elections, told CNN that the swing state was also in the crosshairs this week.

Bell said employees now wear gloves when processing mail and isolate parts of the office if they find suspicious, potentially contaminated items. An official with the Kentucky Secretary of State’s office told CNN that after this week’s incident, employees were instructed to wear gloves when processing mail “out of an abundance of caution.”

“Having to take these additional measures significantly increases the workload and increases our anxiety about doing our jobs when we really want to make sure people can vote,” Bell said.

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