Twitter could become the next target for pro-WikiLeaks hacking 'group' Anonymous as part of its ongoing 'Operation: Payback'.
The 'hacktivists' declared their intention to attack the micro-blogging site in a post on 4chan, the Internet message board with which it is associated.
In the message, which announced a new attack on online payment processing company PayPal "in a few hours", the group stated: "You're next Twitter for censoring #wikileaks discussion".
The site has been accused of suppressing WikiLeaks-related content such as the hashtag #wikileaks from its worldwide trending.
Anonymous has claimed responsibility for a number of cyber attacks against big businesses it claims have sided with the US government against WikiLeaks and its founder Julian Assange.
Multi-billion dollar payment service PayPal incurred Anonymous's wrath after it pulled the plug on WikiLeaks' funding.
The company announced at the weekend that it would no longer process any further donations to WikiLeaks, claiming that the whistle-blowing site had committed "a violation of the PayPal Acceptable Use Policy".
PayPal later claimed to have been put under pressure by the US government.
The company's action was swiftly followed by credit card issuers Visa and Mastercard, which today found itself the subject of a Distributed Denial of Service (DDoS) attack, with reports indicating that the company's American site has been taken down.
Anonymous has also claimed responsibility for the taking down the web site of the Swiss post office bank that froze the assets of WikiLeaks founder, Julian Assange.