"As long as they remain in power, the war will continue", the Russian leader said.
In response to questions about Trump's interactions with Putin, White House Press Secretary Sarah Sanders said both leaders had informal conversations.
Moscow accused the 24 sailors of illegally crossing the Russian border. Putin's wish list is topped by a desire to see an end to crippling anti-Russian sanctions imposed by the United States and its allies for Russia's annexation of Ukraine's Crimean Peninsula, its support for separatist insurgents in eastern Ukraine and other actions by Moscow.
"Putin took out a sheet of paper and sketched out the sea and the strait and tried to explain to the president the route the Ukrainian ships had taken through neutral, then territorial, waters", an aide to Macron told journalists.
"I find it very appropriate to have a meeting about Idlib even if it's for a short time", Erdoğan said.
Poroshenko on Saturday repeated allegations that Russia had amassed a large military force in eastern Ukraine, which is controlled by pro-Russian separatists, and in Crimea, which Russia annexed from Ukraine in 2014.
Mr Trump's Secretary of State Mike Pompeo had said the gathering was cancelled "because the Russians behaved in a way that is deeply inconsistent with global law".
In remarks to the summit relayed by the Xinhua news agency, Xi reaffirmed his pledges of economic reform "with increased efforts in intellectual property rights protection and more imports". "The Russians behaved in a way that is deeply inconsistent with worldwide law".
Ukraine's leader has called on Germany and its allies to boost their naval presence in the Black Sea to deter Russian Federation from further aggression in the region.
Friday's version entailed Putin drawing a map of the Kerch Strait to buttress his position that the Ukrainian ships his navy seized had intruded into Russian waters - a claim denied by Kiev.
He and Mr Trump will meet later for talks over dinner, it has been announced.
Putin also said that he spoke about the matter with several foreign leaders at the G-20 summit.
"We had an opportunity to discuss the ongoing process in Northern Syria with the U.S.as two strategic partners".