Some airlines have canceled or diverted flights to Ukraine amid warnings from the West that an invasion by Russia is imminent as Kyiv says it will keep its airspace open. Russia denies it intends to invade Ukraine despite massing tens of thousands of troops near the Ukrainian border and denouncing the West of “peak hysteria”. A call between US President Joe Biden and Russian President Vladimir Putin failed to result in a breakthrough on Saturday, with the US warning Russia of crippling sanctions for military aggression.