The passenger who was seen in a viral video punching a flight attendant — and busting two of her teeth — has been permanently banned from the airline.

The horrific altercation happened on a Southwest Airlines flight that had just landed in San Diego earlier this week, when the unnamed flight attendant approached Vyvianna Quinonez, 28, and her family about not wearing masks.

Southwest officials said Ms Quinonez would be barred from the airline in a memo to flight attendants, according to USA Today.

“As we’ve communicated previously, we do have a process to permanently restrict passengers from travelling on Southwest, and please know that the passenger involved in the most recent incident has been advised that she may no longer fly on Southwest Airlines,” Sonya Lacore, Southwest’s vice president of in-flight operations, wrote in the memo, according to the newspaper.

Ms Quinonez is also facing a felony charge of battery causing serious bodily injury in connection with the incident, the Port of San Diego Harbour Police Department said.

“According to witnesses, an altercation between a passenger and a flight attendant had taken place during the flight. During the altercation, the passenger struck the flight attendant, causing serious injuries,” the agency said.

However, one passenger who recorded the fight said the flight attendant should not have escalated the confrontation, or touched the suspect.

“It was so unnecessary. In the first altercation, she had said that she was going to call the captain,” passenger Michelle Manner, who was sitting two rows in front of them, told local station Fox 40.

Ms Manner claims that instead of doing that, she came back over and put her hands on Ms Quinonez.

“Vyvianna had said to her three times, that we could hear, ‘Get off of me. Quit touching me. Get your hands off of me,’” she recounted to the station.

The flight attendants union, Transport Workers Union Local 556, first disclosed the incident and the worker’s injuries to USA Today.

“This past weekend, one of our flight attendants was seriously assaulted, resulting in injuries to the face and a loss of two teeth,” Lyn Montgomery, president of TWU Local 556, said in the letter, obtained by the newspaper Monday.

“Unfortunately, this is just one of many occurrences.”

The TSA has expanded mandatory mask-wearing guidelines on planes through September, and said violators will be punished, amid a reported spike in incidents regarding mask compliance.

“We’re addressing it quite forcefully,” Department of Homeland Security Secretary Alejandro Mayokas said at a news conference, according to the report.

“We’re not going to tolerate behaviour that threatens the wellbeing of the public (or) of the employees that bravely are on the front lines to facilitate the travel for individuals who want to reunite with family and friends.”

This article originally appeared on the New York Post and was reproduced with permission