Putin and Trump
US President Donald Trump has tweeted that "it is time to move forward in working constructively with Russia," citing a ceasefire negotiated for southwest Syria as proof that this is possible.

Donald Trump met with Russian President Vladimir Putin for more than two hours in Hamburg on Friday, the first day of the G20 summit.

"We negotiated a ceasefire in parts of Syria which will save lives. Now it is time to move forward in working constructively with Russia!" Trump wrote on Twitter.

Trump also tweeted that he and Russian President Vladimir Putin had discussed forming an impenetrable cybersecurity unit to prevent election hacking.

The US president, however, later clarified that the fact that he discussed a joint cybersecurity unit with Putin "doesn't mean I think it can happen."

Trump added that he had "strongly pressed" Putin "twice about Russian meddling in our election."

"He [Putin] vehemently denied it. I've already given my opinion," he said.

Putin confirmed on Saturday that the accusations claiming Russia meddled in the US election had been addressed during his conversation with Trump. The Russian president reiterated that there is no reason to believe that Russia interfered in the US electoral process.

"He [Trump] asked many questions on that subject. I answered those questions as best I could. I think he took it into consideration and agreed with me, but you should really ask him how he feels about it," Putin said.

Putin confirmed on Saturday that both leaders had shared their views on cybersecurity, saying they had agreed to "create a working group and work together on how to jointly monitor security in cyberspace."

After their meeting at the G20, US and Russian officials announced that a ceasefire deal had been agreed upon for southwest Syria, to take effect on Sunday, July 9. The ceasefire applies to the Daraa, Quneitra, and As-Suwayda provinces.

Trump said on Saturday that his meeting with Putin had been "tremendous." Putin noted later that the Trump seen on television is different from the one in real life, adding that he felt relations between the two countries could at least be partially restored.

"I think that if we continue building our relations like during our conversation yesterday, there are grounds to believe that we'll be able to - at least partially - restore the level of cooperation that we need," Putin said, addressing journalists.

Putin-Trump cybersecurity cooperation to take place, but will take time - Russia G20 sherpa

Russia-US cooperation on cybersecurity will take place in the future, but it will probably take some time to set up the framework, a Russian sherpa at the G20 summit said. She added that President Putin had proposed the idea of a joint cybersecurity unit.

"Cybersecurity remains a key issue in US-Russian relations, as far as I know, [the presidents] discussed this issue for at least 40 minutes at the meeting [on the sidelines of G20]," Svetlana Lukash, a Russian G20 sherpa, or representative of the Russian president at the summit, said.

Lukash was referring to Trump's recent comments, saying that the fact that he discussed an impenetrable cybersecurity unit with Putin during their first-ever meeting "doesn't mean I think it can happen."

"President Putin made a suggestion to create a working group [on cybersecurity], this does not mean that it must start work tomorrow," Lukash said.

According to the Russian official, the key point about these talks was that "the US is ready to consider cooperation in this area."

"We shall see later, maybe it will be a working group, maybe it will be an interaction within UN. Anyway, our countries need to discuss these issue, this is exactly what the presidents agreed upon," Lukash added.

"Maybe now, at this stage, President Trump is not ready for such a concrete initiative.

"But this does not mean that there will be no cooperation between the two countries in this area, in any form convenient for both sides," Lukash said.

Trump's comments on Twitter would have no effect on the level of trust between Russian President Vladimir Putin and his US counterpart, Kremlin spokesman Dmitry Peskov said.

"Why should it affect trust? It can't affect it," Peskov said when asked about the US president's tweet.

He confirmed that "there really was talk about the possibility of putting together such a [cybersecurity] group," but added that "only time will tell if it'll be created or not."

"Besides, you know that the [Russian] president provided Trump with all the necessary assurances and explanations that any claims of possible involvement of some Russian agencies in cyberattacks during the electoral campaign in the US are pure fiction and don't correspond to reality. And in this context it was mentioned that the best possible way of tackling cyberterrorism is through cooperation [between Russia and the US]," Peskov said, as cited by RIA Novosti.

"Nobody made any promises... Only readiness to work in this direction was stated," he added.

'Sanctions not discussed with Putin, until Ukrainian crisis resolved' - Trump

Donald Trump also tweeted that he hadn't discussed the sanctions the West has imposed on Russia during his meeting with Putin at the G20.

"Sanctions were not discussed at my meeting with President Putin," he wrote, adding that "nothing will be done" until the Ukrainian and Syrian crises are resolved.

The leaders also agreed to create a bilateral channel to promote a settlement for the crisis in Ukraine, Russian Foreign Minister Sergey Lavrov said on Friday.

The sanctions issue was later raised by US Secretary of State Rex Tillerson, who arrived in Ukraine on Sunday for his first official visit.

"The US and the EU sanctions on Russia will remain in place until Moscow reverses the actions that triggered these particular sanctions," Tillerson said at a joint press conference with Ukrainian President Petro Poroshenko in Kiev.