Twitter will be enforcing new rules on abuse as the social media site aims to reduce hateful content.
New guidelines on abuse, hateful conduct as well as violence and physical harm are the focus of the updated rules, which were announced in November.
A new rule regarding violence will also take into account activity offline, forbidding users from affiliating with organisations that promote violence against civilians either either on or off Twitter.
The social site has been overhauling many of its policies in recent weeks following repeated criticism over how it handles abusive content.
New guidelines coming into force also prohibit the use of "hateful images or symbols" in user profiles or biographies.
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Breach of any of the new rules can lead to permanent account suspension, Twitter said.
Last month the site paused its verification process, as well as removing verified 'blue tick' badges from right-wing figures.
The company was also recently accused of failing to act on anti-Muslim videos retweeted by US president Donald Trump because the incident made global headlines.
The site was forced to clarify its position after an it initially appeared to suggest the videos, retweeted by Mr Trump from the account of Britain First deputy leader Jayda Fransen, were not removed because they stoked debate.
