Musk, 53, spoke to a crowd of Trump supporters at Capital One Arena in Washington, D.C., after Trump was sworn in at the U.S. Capitol. While thanking the supporters, Musk put his right hand over his heart, then extended his arm out with his palm down. He then turned around and repeated the gesture.

X users believe Elon Musk did "the Hitler salute", also known as the "Nazi salute", in a huge inauguration blunder. The billionaire made the eerily similar gesture when he slapped the podium and raised his flat hand into the air.

The tech billionaire stiffly extended his arm to the crowd twice in a gesture similar to a Nazi salute during Trump's inauguration event

Online users shared videos showing Musk twice extending his hand outward from his heart but omitted his words explaining the gesture.

Many were critical of the tech billionaire's speech and gesture, with one X user writing: "You all know what he just did. Don't try to hide from it" The post Elon Musk’s Salute to Trump Crowd Condemned as Nazi Signal: ‘What the Actual F–k?

Elon Musk offered Donald Trump supporters what looked a lot like a Nazi salute on live TV at Trump's post-swearing-in inauguration rally.

Elon Musk responds to the criticism over his one-armed gesture during Trump's inauguration which sparked controversy.

Elon Musk is mulling legal action against “creepy” Minnesota Gov. Tim Walz for suggesting he performed the Nazi salute during his speech after Trump’s inauguration.