The Russian economy is in an increasingly precarious state as a result of a shift to a war mode and of Western sanctions over Moscow's invasion of Ukraine, a report by the Stockholm Institute of Transition Economics (SITE) said on Tuesday.

Ukrainian officials say Russia launched more than 100 drones, rejecting calls for a ceasefire as Zelenskyy says he'll "be waiting for Putin" to join him for direct talks in Turkey.

The attacks came a day before a Russian-proposed cease-fire was to take effect and as Moscow prepared to welcome foreign dignitaries for a parade.

Russia said on Saturday that fighting had been taking place in four regions of Ukraine despite this week's unilateral ceasefire by Moscow, saying its troops had been forced to respond to Ukrainian attacks.

The United Nations aviation agency has ruled that Russia was responsible for shooting down a Malaysian Airlines flight over Ukraine in 2014 that killed all 298 people on board.

BELGRADE (Reuters) - Serbia remains committed to its plan to join the European Union and wants to speed up its membership bid, President Aleksandar Vucic said on Tuesday after his recent trip to Moscow drew Western criticism.

The Kremlin on Tuesday rejected as biased a ruling by the U.N. aviation council that Russia was responsible for the downing of a Malaysian airliner over Ukraine in 2017 that killed all 298 passengers and crew.

Russia has spent most of its National Wealth Fund in the past few years, with liquid funds potentially being depleted in 2025, one economist says.