The move affects content from Facebook, Instagram and Mastodon among other social media sites.
Twitter had already blocked users from sharing some links to Mastodon, the platform many Twitter users moved to after Mr Musk's takeover.
"Specifically, we will remove accounts created solely for the purpose of promoting other social platforms and content that contains links or usernames for the following platforms: Facebook, Instagram, Mastodon, Truth Social, Tribel, Nostr and Post." There has been flurry of controversial changes at Twitter since Mr Musk bought the social media site for $44bn in October.
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