Russia threatened retaliation after accusing Ukraine of attempting to attack president Vladimir Putin’s residence, casting uncertainty over fragile peace efforts.US president Donald Trump said Putin told him about the alleged attack during a phone call on Monday,

Russia has claimed significant battlefield advances in December, reporting the capture of dozens of settlements and hundreds of square kilometers of territory across Ukraine’s frontline.

Moscow claims its forces crushed Ukraine’s unmanned robotic ground supply lines near Gulyaipole using FPV and quadcopter strike drones, disrupting ammunition and logistics delivery to frontline positi...