The Orlando office of Rep. Maxwell Frost, D-Fla., was evacuated Friday after receiving a “suspicious package” that matched those received by offices of other lawmakers and state officials.

The packages, according to law enforcement, were mailed to multiple congressional and election offices nationwide. Some contained an unknown substance, authorities said.

Frost said in a statement Friday that he and his district office staff are safe, adding the office was evacuated as a precaution.

The U.S. Postal Inspection Service, FBI and U.S. Capitol Police are investigating the series of suspicious mailings, which were sent to the offices of multiple Democratic senators, including Senate Minority Leader Chuck Schumer of New York, as well as some Republican state officials.

Several secretaries of state and other elections offices across the country were also targets of the letters, according to Brendan Donahue, deputy chief inspector for the U.S. Postal Inspection Service.

“Some of the letters have contained an unknown substance, and we’re working closely with our law enforcement partners to respond to each incident,” Donahue said, adding that authorities are working to identify the source of the letters.

Also Friday, Democratic Rep. Ritchie Torres of New York said his district office had also received an envelope containing a suspicious substance.

“We are living in a time when threats against elected officials and their staff have become the new normal. Although my team is understandably shaken by the incident, we will not be deterred from serving the people of NY-15 in the Bronx,” Torres said in a statement.

A test of the substance conducted by the New York Fire Department determined it was “non-hazardous,” and Torres did not report that he or anyone else had been harmed by the envelope.

Nebraska Secretary of State Robert Evnen, a Republican, said Thursday that his office “received a suspicious envelope matching the description of suspicious mailings sent to other state election offices across the country this week.” The envelope was not opened, according to a statement from Evnen’s office.

Republican Ohio Secretary of State Frank LaRose said Wednesday that his office is working with state and federal law enforcement after confirming it was the intended recipient of “a suspicious mailing that contained a powdery white substance.”

“Fortunately, delivery of the letter was preempted by investigators at the U.S. Postal Service, who are dealing with similar mailings sent to election officials in multiple states,” LaRose said in a statement, adding that “election officials should never have to fear for their personal safety while performing their duties.”

Messages sent to members of the Senate and House on Thursday morning informed lawmakers and their staff of the investigation.

The Office of the Sergeant at Arms of the House described the suspicious substance as a “white powder.”

No House offices have received the letters, according to the notice, and it was not immediately clear Thursday whether any of the mailings had reached Senate offices, nor to which offices they had been addressed.

“Law enforcement officials are working to intercept any additional letters before they are delivered, however, it is possible that some letters may reach their destinations,” the Senate message said.

The office of Sen. Chris Murphy, D-Conn., was among those that were sent a letter with a suspicious substance, according to spokesperson Josh Sorbe, but the letter was intercepted.

A letter was also sent to the office of Sen. Alex Padilla, D-Calif., spokesman Danny Rodriguez said. Padilla’s office was notified by the FBI about the letter, which was intercepted by USPS, according to Rodriguez.

Another letter had a return address that read “DSA,” from a suite in a New York City office building in the financial district of Manhattan, according to the notice sent to Senate offices.

The Democratic Socialists of America previously occupied the address, but have not been in the suite since 2013, and moved out of the building in January, a DSA spokesperson said. The spokesperson added that the DSA was not involved.

In a statement to MS NOW, an FBI spokesperson confirmed the agency’s joint investigation with USPS, but did not confirm further details.

The suspicious letters come three weeks before Election Day. Both chambers are formally adjourned as members campaign for re-election in their districts.

CORRECTION (Oct. 15, 2026, 4:30 p.m. ET):
A previous version of this article incorrectly stated that Sen. Chris Murphy’s office received one of the letters mailed to congressional and election offices. A spokesperson for the senator’s office says one of the letters was addressed to him but was intercepted in the mail. The earlier story also incorrectly stated that another letter was sent to “DSA” at a Manhattan address. That was the return address.

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