The department responded shortly before 3pm. Local time after the Los Angeles Police Department requested a response to dangerous materials. The fire department reported that no patients needed an examination. The department started to leave the scene at 4:38 pm. Local time, after a statement.
One person came in contact with the package, but the person had no medical complaints, according to Stewart.
Waters was a vocal critic of the Trump administration, and she received widespread criticism for comments calling for public harassment from Trump administration officials.
In June, the Democratic congressman canceled two events after receiving threatening phone calls and "hostile mail" in her office.
"As the President continues to lie and falsely claim that I have encouraged people to attack his supporters, and at the same time a veiled threat that I should be careful," send more people (threats) and send hostile mail into mine Office, "she said in a June statement.
" On Monday, there was a very serious death threat against me from a person in Texas, which is why my scheduled lectures in Texas and Alabama were canceled this weekend. "The statement continued. "This is just one of several very serious threats that US Capitol police investigate in which people shoot, lynch, or inflict serious personal injury."
Waters & # 39; representatives in Washington did not respond Comment on the incident
This story has been updated.
CNN's Ashley Kil lough contributed to this report.