Vladimir Putin is unlikely to bow to a sanctions ultimatum expiring this Friday from Donald Trump, sources close to the Kremlin have said.The US president has threatened to hit Russia with new sanctions and impose 100 per cent tariffs on countries that buy its oil,

The Kremlin is weighing options for a concession to US President Donald Trump that could include an air truce with Ukraine to try to head off the threat of secondary sanctions, even as Russia remains determined to continue its war.