President Donald Trump has said that the leaders of Russia and Ukraine have agreed to his request for a three-day ceasefire and an exchange of prisoners, adding that such a halt to hostilities could be the "beginning of the end" of the long war between them. Ukrainian President Volodymyr Zelenskyy and Yuri Ushakov, Russian President Vladimir Putin's foreign affairs adviser, both confirmed the agreement. "I asked and, President Putin agreed.