President Trump on Sunday said he and Russian President Vladimir Putin talked about creating an "impenetrable Cyber Security unit" during their meeting at the G-20 summit.

"Putin & I discussed forming an impenetrable Cyber Security unit so that election hacking, & many other negative things, will be guarded.....and safe," Trump tweeted.

"Questions were asked about why the CIA & FBI had to ask the DNC 13 times for their SERVER, and were rejected, still don't.......have it."

Trump also went after former President Obama, claiming he did nothing before the election when he found out information about the Russian election meddling.

"Fake News said 17 intel agencies when actually 4 (had to apologize). Why did Obama do NOTHING when he had info before election?" Trump tweeted.

Putin & I discussed forming an impenetrable Cyber Security unit so that election hacking, & many other negative things, will be guarded.. — Donald J. Trump (@realDonaldTrump) July 9, 2017

...and safe. Questions were asked about why the CIA & FBI had to ask the DNC 13 times for their SERVER, and were rejected, still don't.... — Donald J. Trump (@realDonaldTrump) July 9, 2017

...have it. Fake News said 17 intel agencies when actually 4 (had to apologize). Why did Obama do NOTHING when he had info before election? — Donald J. Trump (@realDonaldTrump) July 9, 2017

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Trump met with Putin Friday during the G-20 summit in Germany.

During the meeting, Trump said he also pressed Putin about the Russian meddling in the 2016 presidential election. Trump said Putin "vehemently denied" it.

Trump has also in the past chided Obama for his response to the Russian hacking.

Trump on Sunday also said he "strongly pressed" Putin on Russian interference.

The president did not say, however, if he accepted Putin's denial.