"I replied to his questions about the incident in the Black Sea", Putin told reporters at the end of the summit.
Poroshenko told France 24 in an interview that Ukraine would try to resolve the standoff diplomatically but insisted Russian forces withdraw from Crimea and return its ships and sailors "captured illegally in the neutral waters of the Black Sea".
Speaking at a Ukrainian military event, President Petro Poroshenko said Russian Federation has deployed "more than 80,000 troops, 1,400 artillery and multiple rocket launch systems, 900 tanks, 2,300 armored combat vehicles, 500 aircraft and 300 helicopters" along their common border.
"The freedom of shipping traffic in the Sea of Azov. must be ensured".
However, the reason for our canceled meeting is Ukraine.
World leaders have gathered in Buenos Aires for the G20 summit this weekend.
At the time, several Ukrainian Navy ships tried to sail through the strait without seeking the proper permission, Moscow said.
Last week's clash at sea has driven tensions between Russian Federation and Ukraine to their highest point since Moscow annexed Crimea in 2014.
In an exclusive interview with CNN's Wolf Blitzer on the sidelines of the global summit, Pompeo said Trump scrapped the anticipated meeting "because the Russians behaved in a way that is deeply inconsistent with worldwide law". Russian Federation has already annexed the Black Sea peninsula of Crimea. He spoke Saturday said at an Ukrainian military event. In response, Kyiv imposed martial law in some regions of Ukraine.
The martial law order included a ban on entry to Ukraine of all Russian males aged 16 to 60, a move Poroshenko said is created to prevent undercover Russian military units from infiltrating the country.