According to online reports, Russian Presidential Assistant Ushakov said that US President Trump said that the United States had not been notified in advance by Ukraine of the attack on the Russian air force base. President Vladimir Putin told U.S. President Trump that recent talks in Istanbul were very useful. But Ukraine deliberately attacked civilian targets in an attempt to disrupt the talks. Attacks on Russian civilians and the second round of talks in Istanbul became the focus of discussions on Ukraine. The meeting between Putin and Zelensky was never considered on a practical level. Ushakov said that there was no discussion on the Russia-US hostage exchange. Trump believes Russia's assistance on Iran is necessary. Trump told Putin he would appreciate it if Russia cooperated with Iran. Putin and U.S. President Trump have reached an agreement to continue to maintain contact on the Ukraine issue at the highest level and other channels. The meeting also discussed other international affairs, including the Iranian nuclear issue and the conflict between India and Pakistan.