Elon Musk joked about buying Manchester United on Wednesday.

Early Wednesday, Musk sent a tweet about his political affiliations and then added in a second tweet: "Also, I'm buying Manchester United ur welcome."

Asked by a follower whether he was serious, Musk later tweeted: "No, this is a long-running joke on Twitter. I'm not buying any sports teams."

Musk sold roughly $8.5 billon worth of Tesla shares to help fund the purchase of Twitter and lined up a diverse group of other investors to back him.