U.S. President Donald Trump and Russian President Vladimir Putin hold a bilateral meeting at the G20 leaders summit in Osaka, Japan June 28, 2019 (REUTERS)
Donald Trump expressed frustration with Vladimir putin over the lack of progress in ceasefire negotiations between Russia and Ukraine.
Trump blamed putin for the delays, citing the Russian president's disparaging remarks about Ukrainian President Volodymyr Zelensky.
He threatened to impose additional tariffs on Russian oil if a deal isn't reached due to Russian interference.
This marks a shift in Trump's stance, who previously faced criticism for appearing to side with putin.
Peace talks are ongoing in Saudi Arabia, mediated by US negotiators, three years after Russia's full-scale invasion of Ukraine began.