At least two unions representing flight attendants have voiced concerns over the pro-Trump rioters who stormed the U.S. Capitol Wednesday.

The Association of Flight Attendants-CWA (AFA) International, which represents 50,000 flight attendants across 17 airlines, said the rioters should not be allowed on their returning flights.

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“Our first priority in aviation safety and security is to keep any problems on the ground. Some of the people who traveled in our planes … participated in the insurrection at the Capitol [Jan. 6],” a statement from AFA reads. “Their violent and seditious actions at the Capitol create further concern about their departure from the DC area. Acts against our democracy, our government, and the freedom we claim as Americans must disqualify these individuals from the freedom of flight.”

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The Association of Professional Flight Attendants (APFA), the union representing American Airlines flight crew, agrees after various incidents on flights to the area.

“APFA Leadership was made aware of incidents on various flights headed to Washington, D.C.,” read a release from the APFA president Julie Hedrick. “During these incidents, some of which broadcasted over social media, Flight Attendants were forced to confront passengers exhibiting politically motivated aggression towards other passengers and crew. This behavior is unacceptable, and Flight Attendants should not have to deal with these egregious incidents.”

What Are Airlines Doing?

American Airlines and United Airlines have both increased staffing at the DC-area airports where they operate, CNN is reporting.

Both airlines added that their crew members with overnight layovers in Washington, DC, will not stay in downtown hotels.

American announced that it would suspend alcohol service on its flights to and from the region.