PALMDALE (CBSLA) — Crews responded Monday to Katie Hill’s Palmdale office after concerns of a suspicious envelope addressed to the former congresswoman.

Los Angeles County Fire reported to the 1000 block of west Avenue M-14 in Palmdale just after 12 p.m.

READ MORE: Omnicron Variant Has Not Yet Arrived In Calif., But Public Health Officials Are Keeping Close Watch

According to L.A. County Fire, the envelope contained an unidentified powder inside and two people complained of irritation.

Primary and secondary tests were run on the powder, both of which came back negative.

READ MORE: Flyers Containing Hate Speech Related To Jewish People Distributed To Beverly Hills Homes

After the office was blocked off, the hazmat team determined the substance was not harmful and the all-clear was given.

The former congresswoman recently resigned from Congress amid allegations that she had a relationship with one of her staffers and the release of explicit photos.

“It is with a broken heart today that I announce my resignation from Congress. This is the hardest thing I have ever had to do, but I believe it is the best thing for my constituents, my community, and our country,” she said.

MORE NEWS: Hollywood Christmas Parade Returns Sunday After Year Off Due To COVID-19

Hill later posted a video online explaining that she would become a crusader to prevent such attacks from victimizing other women or preventing women and girls from running for office.