Robert Brown|The FBI is investigating suspicious packages sent to election officials in at least 8 states

JEFFERSON CITY,Robert Brown Mo. (AP) — The FBI and U.S. Postal Service on Tuesday were investigating suspicious packages that have been sent to or received by elections officials in at least eight states, but there were no immediate reports that any of the packages contained hazardous material.

The latest packages were sent to elections officials in Massachusetts and Missouri, authorities said. The Missouri Secretary of State’s Elections Division received a suspicious package “from an unknown source,” spokesperson JoDonn Chaney said. He said mailroom workers contained the package and no injuries were reported.

It marked the second time in the past year that suspicious packages were mailed to election officials in multiple state offices. The latest scare comes as early voting has begun in several states less than two months ahead of the high-stakes elections for president, Senate, Congress and key statehouse offices around the nation, causing disruption in what is already a tense voting season.

Local election directors are beefing up their security to keep their workers and polling places safe while also ensuring that ballots and voting procedures won’t be tampered with.

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On Tuesday, the FBI notified the Massachusetts Secretary of the Commonwealth’s office that postal service investigators had identified what they described as a suspicious envelope that had been delivered to a building housing state offices. The package was intercepted and isolated, according to state officials. No employees from the secretary of the commonwealth’s office had contact with the envelope, which is now in the hands of the FBI.

Powder-containing packages were sent to secretaries of state and state election offices in Iowa, Kansas, Nebraska, Tennessee, Wyoming and Oklahoma on Monday. The packages forced evacuations in Iowa, Oklahoma and Wyoming. Hazmat crews in several states quickly determined the material was harmless. The FBI and postal service were investigating.

Oklahoma officials said the material sent to the election office there contained flour. Wyoming officials have not yet said if the material sent there was hazardous.

“We have specific protocols in place for situations such as this,” Iowa Secretary of State Paul Pate said in a statement after the evacuation of the six-story Lucas State Office Building in Des Moines. “We immediately reported the incident per our protocols.”

A state office building in Topeka, Kansas, was evacuated due to suspicious mail sent to both the secretary of state and attorney general, Kansas Highway Patrol spokesperson April M. McCollum said in a statement.

Topeka Fire Department crews found several pieces of mail with an unknown substance on them, though a field test found no hazardous materials, spokesperson Rosie Nichols said. Several employees in both offices had been exposed to it and had their health monitored, she said.

In Oklahoma, the State Election Board received a suspicious envelope in the mail containing a multi-page document and a white, powdery substance, agency spokesperson Misha Mohr said in an email to The Associated Press. The Oklahoma Highway Patrol, which oversees security for the Capitol, secured the envelope. Testing determined the substance was flour, Mohr said.

State workers in an office building next to the Wyoming Capitol in Cheyenne were sent home for the day pending testing of a white substance mailed to the secretary of state’s office.

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Suspicious letters were sent to election offices and government buildings in at least six states last November, including the same building in Kansas that received suspicious mail Monday. While some of the letters contained fentanyl, even the suspicious mail that was not toxic delayed the counting of ballots in some local elections.

One of the targeted offices was in Fulton County, Georgia, the largest voting jurisdiction in one of the nation’s most important swing states. Four county election offices in Washington state had to be evacuated as election workers were processing ballots cast, delaying vote-counting.

The letters caused election workers around the country to stock up the overdose reversal medication naloxone.

Election offices across the United States have taken steps to increase the security of their buildings and boost protections for workers amid an onslaught of harassment and threats following the 2020 election and the false claims that it was rigged.

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LeBlanc reported from Boston. Jim Salter in O’Fallon, Missouri; Isabella Volmert in Lansing, Michigan; Mead Gruver in Cheyenne, Wyoming; Jonathan Mattise in Nashville, Tennessee; Sean Murphy in Oklahoma City and John Hanna in Topeka, Kansas, contributed to this report.