New York-based activist and co-chair of the Women’s March on Washington Tamika Mallory says she was racially discriminated against when she was kicked off an American Airlines flight in Miami on Sunday over a seating issue.

Mallory, who is black, said she was targeted by a white pilot and removed from a flight from Miami to New York.

"It definitely was white male aggression. I was singled out, I was disrespected, and he was trying to intimidate me. I was discriminated against," Mallory told the New York Daily News.

I was just removed from an .@americanairlines flight because of white make aggression. I will fight this until I die! — Tamika D. Mallory (@TamikaDMallory) October 15, 2017

An American Airlines spokesman said the Fort Worth-based carrier is taking the allegation seriously and has spoken to all involved, including Mallory.

“Due to an error with a seat change request, Ms. Mallory was informed her requested seat was not available and she was given her original, pre-reserved seat. Our team members apologized for the error and attempted to de-escalate the situation,” spokesman Josh Freed said. “Ms. Mallory was rebooked on the next flight to New York’s LaGuardia airport.”

A spokesman for the Allied Pilots Association, which represents American Airlines pilots, said the incident is under investigation.

Tamika Mallory (Robin Marchant / Getty Images)

Mallory is involved in social justice and civil rights efforts and helped organize the Women’s March on Washington that drew hundreds of thousands of people to the nation's capital in January.

In an at-times tearful video posted to Facebook Sunday night (and shown at the end of this story), Mallory said the issue started when she was trying to board the plane. Mallory said she’d switched her seat assignment to an aisle seat using a check-in kiosk, but her seat was reverted to the original middle-seat assignment when she tried to board.

Mallory said she felt she was treated rudely by the gate agent when she asked about the change and told the agent she planned to file a complaint.

According to Mallory, part of the conversation was witnessed by the pilot, who later confronted her on the jet bridge as she was preparing to board.

“I understand the issue of if you have a disgruntled person getting on a flight, you want to check to make sure that everything is safe ... so you would think that courtesy and customer service would mean that he would say, ‘Are you OK?’” she said on the video. “Nothing. He starts off telling me that respect goes both ways after this woman has disrespected me."

The @AmericanAir pilot, before kicking me off the plane, asked me "are you gonna behave?" As if I'm not a grown woman worthy of respect... — Tamika D. Mallory (@TamikaDMallory) October 15, 2017

Mallory said she assured the pilot she was fine and would not cause a disruption on the flight.

“He asked me, 'Would I behave? Could I control myself?'” Mallory recounted. “I had not raised my voice. I was not screaming at the [gate agent]. I just firmly let her know that I didn’t appreciate the way I was treated.”

But after taking her seat, she was called up to the front of the plane over the loudspeaker, where Mallory said the pilot pointed at her and said, ‘Her, off.’”

Mallory admitted in the video that at this point she lost her temper and began swearing, though she maintained she had not yelled at the pilot or the gate agent previously. She and her son, who was traveling with her, were escorted off the plane by several police officers.

Mallory tweeted about the incident to her 45,000 followers, and her video describing the incident has been shared more than 2,000 times.

Warning: Video contains explicit language.