R ussian authorities have accused Ukraine of attacking the Kremlin with drones overnight in a failed bid to assassinate President Vladimir Putin. The Kremlin said on Wednesday two drones had been used in the alleged attack on Putin’s residence in the Kremlin citadel, but had been disabled by electronic Russian defences before they could strike. The Kremlin said it considered the attack an act of terrorism and reserved the right to retaliate, state-run RIA news agency reported. “Two unmanned aerial vehicles were aimed at the Kremlin. As a result of timely actions taken by the military and special services with...