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 Federal Bureau of Investigation, along with the U.S. Postal Inspection Service, are investigating suspicious packages that were delivered to election officials in several states, according to officials.

The FBI and U.S. Postal Service are investigating suspicious packages that have been sent to or received by elections officials in at least eight states.

A suspicious package has been sent to the California secretary of state, as well as election officials in at least 15 other states. No one has been hurt.

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.

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

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.