The Russian president says Moscow's initial tough demands must be met, despite a looming US sanctions deadline.

Russian President Vladimir Putin said that Moscow hoped for more peace talks with Ukraine but that the momentum of the war was in its favour, signalling no shift in his stance despite a looming sanctions deadline from Washington.

"Sanctions are working," Andriy Yermak, the head of Zelenskyy's office, wrote on Telegram on Sunday, citing data he said shows a collapse in Russian railway capacity over the past 12 months. "The economy,