The Ukrainian president Volodymyr Zelensky has given a cautious response to Vladimir Putin's offer of direct peace talks. Mr Zelensky said it was a positive sign that Russia was beginning to consider an end to the war - but again called on Moscow to commit to a ceasefire, starting on Monday. In a surprise late night statement, President Putin proposed direct negotiations with Ukraine in Istanbul on Thursday. He said the talks would address what he described as "the root causes of the conflict."