Russia challenged the U.S. to either stop with its campaign hacking accusations or else produce proof to back up the claim.

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A spokesman for Russian President Vladimir Putin “believes it is very indecent of the United States to groundlessly accuse Russia of intervention in its elections,” the Russian state news agency Tass reported.

Russia to US: Prove election hacking claims or shut up https://t.co/2a1ZgWR8JT pic.twitter.com/uMpTOrqmVI — CNN (@CNN) December 16, 2016

“They should either stop talking about that or produce some proof at last. Otherwise it all begins to look unseemly,” Dmitry Peskov said, according to Tass.

#Peskov: Accusations that Russia is involved in cyberattacks are unprofessional, groundless, have nothing w/ reality https://t.co/Y5kW0F1KwF pic.twitter.com/LGEmoxe1Z2 — Russia in USA ?? (@RusEmbUSA) December 12, 2016

With a few weeks left in office, President Obama vowed that “we need to take action and we will” against Russia’s alleged meddling in the U.S. presidential election. The administration faced criticism for its lack of retaliatory action against Putin which was reportedly due to Obama not wanting to appear to be interfering in the election which he was confident Hillary Clinton would win.

@CNN @FoxNews Your move Barack. He called you out. Put up or shut up. — Ken (@Gunny997) December 16, 2016

@CNN Let’s not do another stupid red line when it comes to Russia…Based on pure speculation. Obama shouldn’t try to act tough. Implausible — Question Everything (@tceplus3) December 16, 2016

Former Georgian President Mikheil Saakashvili did not find the hacking claims surprising, and even felt a sense of “I told you so” with the U.S.

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“Well I almost was, like, vindicated when the same administration in Washington suddenly started to speak about Russian involvement in the election,” he told CNN on Friday. “Because we, for me, it’s déjà vu. They were the same people telling us, ‘no, no, it cannot possibly be true.’ And now it came to their doorsteps. And of course he [Putin] does all those things. Of course he is a great master.”