Edinburgh, UK - Police are looking into a threat against Harry Potter author JK Rowling after she tweeted support for fellow author Salman Rushdie, who was attacked in New York on Friday.

Following the brutal attack of author Salman Rushdie (75) as he was preparing to deliver a lecture, JK Rowling took to Twitter to express her disgust.

"Horrifying news," the Harry Potter creator wrote."Feeling very sick right now. Let him be OK."

Another Twitter user replied to her post with a threat: "Don’t worry, you are next."

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This same user, posting under the name "Meer Asif Asiz," also wrote messages praising the man who attacked and stabbed Rushdie.

Rowling posted a screenshot of the threat to Twitter on Saturday. She thanked those who'd sent supportive messages to her and said the authorities were investigating the threat.

However, she struck up some beef with Twitter over the threat, and called out the company's empty promises.

The bestselling author, who's become a controversial figure due to her comments about the transgender community and has received threats on Twitter in the past, called on Twitter to get involved.

"@TwitterSupport any chance of some support?" she wrote after the threat over Rushdie.

As per reports, Rowling said Twitter responded by saying there were "no violations of the Twitter rules in the content you reported. We appreciate your help, and encourage you to reach out again in the future if you see any potential violations."

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In response, Rowling tweeted quotes from the social media giant's guidelines that say the platform may not be used to threaten violence.

"These are you guidelines, right?" she quipped.

Twitter has not responded. But as of Sunday, the message from Meer Asif Asiz had been removed.

Yet, others are standing behind Rowling over the incident.

Warner Bros. Discovery, the film studio behind the Harry Potter movies, condemned the threats made against Rowling in a statement.

"We stand with her and all the authors, storytellers and creators who bravely express their creativity and opinions," the company said.

"Our thoughts are with Sir Salman Rushdie and his family following the senseless act of violence in New York. The company strongly condemns any form of threat, violence or intimidation when opinions, beliefs and thoughts might differ."

Luckily, the novelist is recovering since the stabbing, and the 24-year old suspect has been arrested. The British-Indian author has been persecuted for decades by religious fanatics for his work, The Satanic Verses.

On Sunday, his son issued an update on Twitter: "Despite his serious and life-changing injuries, his usual combative and defiant sense of humor remains intact."