After video of a passenger being forcibly dragged from an overbooked flight was shared Sunday, Twitter users were quick to share hashtags like #boycottunited and #dontflyunited. Some of these users claimed to be years-long customers, with one frequent flyer suggesting he would “pay more to avoid your planes.”

https://twitter.com/whodat_geaux/status/851451866311516160

https://twitter.com/rgay/status/851460848195448832

And to think I literally JUST booked @united flights to Spain last night. Thank god for 24hr cancellation! #BoycottUnited #flight3411 pic.twitter.com/Sa3Kqx9Z0o

— Britney Byrne (@BritByrne) April 10, 2017

.@united Learn what the word "volunteer" means. (Also, you should probably get familiar with "lawsuit" and "damages" and "boycott.") https://t.co/bhRbpcpVa2

— Hrishikesh Hirway (@HrishiHirway) April 10, 2017

https://twitter.com/ratsarecool/status/851505275181903874

https://twitter.com/1970elk/status/851504533230370819

United CEO Oscar Munoz’s response to the incident only fueled users’ outrage for its euphemistic use of “re-accommodate.”

United CEO response to United Express Flight 3411. pic.twitter.com/rF5gNIvVd0

— United Airlines (@united) April 10, 2017

CEO of @United says "I apologize for having to re-accommodate these customers." pic.twitter.com/5R38GAGr9c

— Jake Tapper (@jaketapper) April 10, 2017

Dear #united, I had to "re-accommodate" someone once pic.twitter.com/MP3ZJDv85m

— Joe Thomas (@joethomas73) April 10, 2017

On Monday, the Chicago Police Department — the city where the incident occurred — said an investigation into the incident was ongoing.