Anonymous has threatened that Donald Trump will regret the next four years as president as it urged its followers to investigate his past for shady connections ahead of the inauguration this week. 
 
 The group, which declared "total war" on Trump ahead of the election last year, called on its supports to look for and reveal any information they can find about the president-elect that could compromise his position. 
 
 In a statement directed to Trump on Twitter Anonymous alleged: "You have financial and personal ties with Russian mobsters, child traffickers and money launderers... This isn't the eighties any longer, information doesn't vanish, it is all out there." 
 
 It then threatened: "You are going to regret the next four years." 

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 / Updated By Alyssa Newcomb 
 
 Anonymous, the loose collective of online hackers, issued an ominous warning to President-elect Donald Trump ahead of his inauguration, telling the billionaire he's going to "regret" the next four years. 
 
 A supporters of the activist group Anonymous wears a mask during a protest in London, Britain. Stefan Wermuth / Reuters 
 
 On Twitter, the group put out a call to action to its followers, urging them to expose any potential compromising information they can find about the soon-to-be new leader of the free world. 
 
 The group tweeted at Trump, repeating unsubstantiated allegations that he has "financial and personal ties with Russian mobsters, child traffickers, and money launderers." 
 
 "This isn't the 80's any longer, information doesn't vanish, it is all out there. You are going to regret the next 4 years. @realDonaldTrump," reads a tweet from @YourAnonCentral, an account used to disseminate information amongt the hacker group. 
 
 Trump, a usually trigger-happy tweeter, seems to be ignoring the threats for now. 
 
 Trump has long been in Anonymous' crosshairs, with the group declaring war on him last year when he was a candidate for President of the United States. 
 
 Related: Trump Information ‘Leaked’ by Anonymous Has Been Online for a While 
 
 In March, private information about Trump was "leaked" by hackers claiming to be a part of Anonymous, including a cell phone and social security number. However, it was later proven that information wasn't new and had been floating around online for some time.
– Anonymous sent an ominous warning to Donald Trump this week, NBC News reports. "You are going to regret the next four years," tweeted an account affiliated with the hacker group. It went on to accuse Trump of having "financial and personal ties with Russian mobsters, child traffickers, and money launderers" and remind him that "information doesn't vanish, it is all out there." Anonymous also asked its followers to actively seek out damaging information on Trump. According to the Telegraph, Anonymous previously declared "total war" on Trump during the election, leaking phone numbers and voicemails purportedly from his phone and briefly shutting down the Trump Tower website.