Suspicious packages were sent this week to election offices in more than 20 states, leading to an FBI investigation, triggering evacuations and rattling staff, according to a CNN survey of state offices and Associated Press reporting.

The FBI and USPS are investigating a string of incidents in which suspicious packages were received at election offices, including in Kentucky.

A package sent to the Iowa Secretary of State’s Office prompted the evacuation of a government building in Des Moines

The Massachusetts Secretary of the Commonwealth received word from the FBI that a suspicious package was intercepted from being delivered to a state building on Tuesday.

The Federal Bureau of Investigation has confirmed no suspicious letter was sent to the Maine Secretary of State's Office, which backtracked an initial statement about a suspicious piece of mail addressed to Secretary Shenna Bellows.