“The Tonight Show”; host, Conan O’Brien, is being targeted in a lawsuit claiming he stole jokes from a Twitter user to broadcast on his show.

According to Gossip Cop, Robert Kaseberg of Santa Monica says his tweets about Caitlyn Jenner and Tom Brady were on “Conan”; shortly after he posted them.

The lawsuit, that was filed in January, states that O’Brien and TBS have violated the copyright on four jokes that he posted.

Related: Conan O’Brien To Join “Simpsons’ Live Show To Sing Monorail Song

One joke Kaseberg claims to be his, and posted on January 14, was a Delta airline joke.

Kaseberg supposedly tweeted, “A Delta flight this week took off from Cleveland to New York with just two passengers. And they fought over control of the armrest the entire flight.”

That same day, O’Brien’s monologue said, “On Monday, a Delta flight from Cleveland to New York took off with just two passengers. Yet somehow, they spent the whole flight fighting over the armrest.”

The second joke in the lawsuit is one on the Washington Monument.

Kaseberg tweeted, “The Washington Monument is ten inches shorter than previously thought. You know the winter has been cold when a monument suffers from shrinkage.”

On February 17 O’Brien said, “Surveyors announced that the Washington Monument is ten inches shorter than what’s been recorded. Of course, the monument is blaming the shrinkage on the cold weather.”

The two jokes about Jenner and Brady are not revealed.

On the filings of the lawsuit, O’Brien and his people say, “We at Conaco firmly believe there is no merit to this lawsuit.”