<p>Amid mounting warnings that a Russian invasion of Ukraine could come any day, the Pentagon said Sunday that the latest top-level US-Russian contacts did not provide "any cause for optimism."</p>.<p>Pentagon spokesman John Kirby offered a grim assessment of the one-hour phone conversation Saturday between US President Joe Biden and Russian counterpart Vladimir Putin.</p>.<p>"It's certainly not a sign that things are moving in the right direction. It's certainly not a sign that Mr. Putin has any intention to de-escalate. And it's certainly not a sign that he is recommitting himself to a diplomatic path forward," Kirby told "Fox News Sunday" when asked about the lack of fundamental change after the call.</p>.<p><strong>Also Read | <a href="https://www.deccanherald.com/international/world-news-politics/biden-putin-call-inconclusive-as-ukraine-tensions-jump-1080940.html" target="_blank">Biden-Putin call inconclusive as Ukraine tensions jump</a></strong></p>.<p>"So, it does not give us any cause for optimism."</p>.<p>US officials in recent days have issued a series of increasingly blunt warnings that a Russian invasion of Ukraine could be imminent, and foreign countries have been rushing to evacuate their nationals.</p>.<p>US national security advisor Jake Sullivan told CNN on Sunday that "a major military action could begin by Russia in Ukraine any day now."</p>.<p>Sullivan used some of the most specific -- and chilling -- language yet employed by an American official, warning that an invasion is "likely to begin with a significant barrage of missiles and bomb attacks... so innocent civilians could be killed."</p>.<p>That, he said, would be followed by a ground invasion in which "innocent civilians could get caught in the crossfire."</p>.<p>Sullivan said Russia might yet opt for a diplomatic solution, but its forces near Ukraine's borders are "in a position where they could launch a military action very, very rapidly."</p>.<p>The growing drumbeat of warnings has infused diplomatic contacts with a sense of intense urgency.</p>.<p>Biden was set to speak to President Volodymyr Zelensky "in coming hours," the Ukrainian leader's office said Sunday.</p>.<p>And German Chancellor Olaf Scholz, who was preparing to leave for talks in Kyiv and Moscow, vowed "tough" and immediate sanctions by Germany and its NATO and European allies should a Russian attack threaten Ukraine's "territorial integrity and sovereignty."</p>.<p>Tensions are now at a "very critical, very dangerous" point, a German government source told reporters.</p>.<p>In London, Defense Secretary Ben Wallace expressed concern that diplomacy was having any effect.</p>.<p>"The worrying thing is that despite the massive amount of increased diplomacy, that military build-up has continued," he told the Sunday Times. "It has not paused, it has continued."</p>.<p><strong>Check out DH's latest videos:</strong></p>
<p>Amid mounting warnings that a Russian invasion of Ukraine could come any day, the Pentagon said Sunday that the latest top-level US-Russian contacts did not provide "any cause for optimism."</p>.<p>Pentagon spokesman John Kirby offered a grim assessment of the one-hour phone conversation Saturday between US President Joe Biden and Russian counterpart Vladimir Putin.</p>.<p>"It's certainly not a sign that things are moving in the right direction. It's certainly not a sign that Mr. Putin has any intention to de-escalate. And it's certainly not a sign that he is recommitting himself to a diplomatic path forward," Kirby told "Fox News Sunday" when asked about the lack of fundamental change after the call.</p>.<p><strong>Also Read | <a href="https://www.deccanherald.com/international/world-news-politics/biden-putin-call-inconclusive-as-ukraine-tensions-jump-1080940.html" target="_blank">Biden-Putin call inconclusive as Ukraine tensions jump</a></strong></p>.<p>"So, it does not give us any cause for optimism."</p>.<p>US officials in recent days have issued a series of increasingly blunt warnings that a Russian invasion of Ukraine could be imminent, and foreign countries have been rushing to evacuate their nationals.</p>.<p>US national security advisor Jake Sullivan told CNN on Sunday that "a major military action could begin by Russia in Ukraine any day now."</p>.<p>Sullivan used some of the most specific -- and chilling -- language yet employed by an American official, warning that an invasion is "likely to begin with a significant barrage of missiles and bomb attacks... so innocent civilians could be killed."</p>.<p>That, he said, would be followed by a ground invasion in which "innocent civilians could get caught in the crossfire."</p>.<p>Sullivan said Russia might yet opt for a diplomatic solution, but its forces near Ukraine's borders are "in a position where they could launch a military action very, very rapidly."</p>.<p>The growing drumbeat of warnings has infused diplomatic contacts with a sense of intense urgency.</p>.<p>Biden was set to speak to President Volodymyr Zelensky "in coming hours," the Ukrainian leader's office said Sunday.</p>.<p>And German Chancellor Olaf Scholz, who was preparing to leave for talks in Kyiv and Moscow, vowed "tough" and immediate sanctions by Germany and its NATO and European allies should a Russian attack threaten Ukraine's "territorial integrity and sovereignty."</p>.<p>Tensions are now at a "very critical, very dangerous" point, a German government source told reporters.</p>.<p>In London, Defense Secretary Ben Wallace expressed concern that diplomacy was having any effect.</p>.<p>"The worrying thing is that despite the massive amount of increased diplomacy, that military build-up has continued," he told the Sunday Times. "It has not paused, it has continued."</p>.<p><strong>Check out DH's latest videos:</strong></p>