Elon Musk took to his social media platform X, formerly known as Twitter, on Monday to troll the Microsoft co-founder Bill Gates over his past ties to the late billionaire pedophile Jeffrey Epstein.

“Someone in an interview should ask – just hypothetically – which island in the Caribbean island is his favorite,” Musk wrote.

This was an apparent reference to claims that Gates visited Epstein’s infamous private island in the U.S. Virgin Islands many times over the years, according to Newsweek. While it’s never been confirmed that Gates visited the island, where Epstein allegedly committed many of his sex crimes, it’s known that the two men had dinner together on multiple occasions.