Donald Trump
Anonymous says it did not leak Donald Trump's Social Security and cell phone numbers Thursday. Above, the Republican presidential candidate is pictured Nov. 10, 2015. Getty Images

Anonymous, the online hacktivist group that declared "total war” on Republican presidential candidate Donald Trump, was credited with leaking his Social Security and cell phone numbers Thursday. The only problem is that Anonymous denied it was responsible, adding that the information online was old.

The group issued its denial multiple times on its Twitter account, which has more than 1.6 million followers. “We know there's information floating around, we're still verifying its authenticity. We care about integrity towards followers and the media,” the group wrote Thursday. “Seems to be outdated information, take it with a grain of salt.”

Still, when Trump’s team heard the rumor, it denied the Social Security number was authentic. It also said it was seeking legal action against the people who tried to expose the data. "The government and law enforcement authorities are seeking the arrest of the people responsible for attempting to illegally hack Mr. Trump's accounts and telephone information," Trump spokeswoman Hope Hicks said Thursday, NBC News reported.

In August, Trump, 69, tweeted the cell phone number that floated around the Internet on Thursday after Gawker published it. “Thank you @gawker! Call me on my cell phone 917.756.8000 and listen to my campaign message,” the presidential candidate wrote at the time.

But it’s no surprise that Anonymous would get credit for “leaking” Trump's personal information. The group threatened to take down the billionaire’s websites April 1. “We have been watching you for a long time, and what we’ve seen is deeply disturbing. You don’t stand for anything but your personal greed and power,” the group said in a video Tuesday. “This is a call to arms. Shut down his websites, research and expose what he doesn’t want the public to know. We need you to dismantle his campaign and sabotage his brand.”

Trump continues to be controversial, despite the threats. He’s claimed Islam hates America and has repeatedly promised to build a wall along the U.S.-Mexican border, which he insists Mexico will pay for.

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