U.S. President Donald Trump said on Sunday that he discussed with Russian President Vladimir Putin forming a cyber security unit in their first meeting.

美国总统特朗普周日表示，他在与俄罗斯总统普京的第一次会面中谈到了网络安全问题。

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

"...Now it is time to move forward in working constructively with Russia!" Trump wrote on another tweet.

The first face-to-face encounter between Trump and Putin came on Friday on the sidelines of the G20 summit in Hamburg, Germany.

After the meeting, Russian Foreign Minister Sergey Lavrov told reporters on Friday that Trump had accepted Putin's denial of Russian meddling in the U.S. election.

Putin himself also said on Saturday that he left the meeting with the impression that Trump had accepted his denial.

"He asked questions, I replied. It seemed to me that he was satisfied with the answers," Putin told reporters on Saturday.