Multiple "subreddits" have banned links from Elon Musk's X platform after the tech mogul flashed a gesture that critics have said resembled a Nazi salute.

A boycott of links to Mr. Musk’s social media platform spread on Reddit this week, after he made a gesture that some likened to a Nazi salute. Others worried about censorship.

Musk then slapped his chest with his right hand, before flinging it diagonally upwards, palm face down. He turned around to audience members behind the podium, and repeated the gesture. “My heart goes out to you,