Moscow, May 9 -- Russian President Vladimir Putin's aide Yury Ushakov told reporters on Saturday that US President Donald Trump's hopes that the ceasefire between Russia and Ukraine would be prolonged are unfounded, as per the state news agency Tass.

"Yes, [Trump's hope for an extension of the ceasefire] is unfounded," the diplomat said. "But he hopes for it, why not? And he is working toward it," Tass reported, quoting Ushakov.

"But this (a prolonged ceasefire) depends not only on him, but also on the other two parties," Ushakov concluded.

Tass further reported that relevant agencies in Russia and Ukraine are working on lists of prisoners of war, and their exchange could begin once the sides reach an agreement, Ushakov told reporters....