A Minnesota man claims he and his two sons were asked to leave a Southwest Airlines flight over a tweet he posted.

Duff Watson told Minneapolis TV station WCCO he had to delete his uncomplimentary tweet about a gate agent before airline officials would let him back on the plane at Denver International Airport.

He and his sons were flying home to Minneapolis from Denver on Sunday.

Watson said he got into an argument with the gate agent over whether his children should be allowed to board "priority" with him.

They weren't, forcing them all to wait.

"In leaving I said, you know, 'Real nice way to treat an A-list. I'll be sure to tweet about it,'" Watson told WCCO.

According to Watson, he tweeted "something to the effect of, 'Wow, rudest agent in Denver. Kimberly S, gate C39, not happy @SWA."

Shortly after boarding, he and his kids were asked to leave the plane. The gate agent said she felt "threatened" by the tweet, and told him he couldn't board the flight until he deleted it.

Southwest Airlines confirmed that a passenger had been removed from that flight, but said the incident was under review and could not elaborate on any disciplinary action.