Russian Federation to deploy new S-400 missiles in Crimea amid sky-high tensions

President Donald Trump's last sit-down meeting with Russian President Vladimir Putin was in Finland in July

Trump faces China trade showdown, Russia, Saudi tensions at G-20

"We have seen this game before", said Jonathan Allen, the United Kingdom's ambassador to the United Nations at a November 26 emergency meeting of the U.N. Security Council. The rest of the group was due in court on Wednesday.

A total of 24 Ukrainian servicemen, including two security service agents, were arrested on Sunday, when three Ukrainian naval vessels in the Black Sea tried to enter the Kerch Strait to reach the Sea of Azov.

On Wednesday, Poroshenko donned camouflage utilities to tour a military training center and warned that Russia is building up forces in the eastern Ukraine region controlled by Russian-backed separatists.

Putin's claim that the Ukrainian vessels had illegally crossed into Russian waters was echoed by Russian Foreign Minister Sergey Lavrov.

Some of Ukraine's Western allies have also raised the possibility of imposing new sanctions on Russia over the episode, which could deliver a blow to the Russian economy.

"It was obviously a flagrant violation of global law", he said of the seizure Sunday of two Ukrainian gunboats and a tugboat and the 24 personnel aboard in the Kerch Strait of the Black Sea.

Putin laid the blame on Ukrainian President Petro Poroshenko, saying that he ordered the navy to provoke the standoff with the sole objective of scoring political points and getting re-elected next year.

Russian President Vladimir Putin expressed "serious concern" over Ukraine's decision to impose martial law.

Ukraine also accused Russian warships of opening fire on the ships, asserting that crew members were wounded and the vessels were seized by Russia.

American service members killed in Afghanistan
A series of recent deadly attacks in Afghanistan has highlighted the ongoing challenge to end a war now in its 18th year. The casualties came after another US soldier was killed in the southwestern province of Nimroz on November 24.

This week, a court in Simferopol, the capital of Crimea, ordered the other 15 Ukrainian sailors to be detained for two months pending a possible trial.

Russian Federation and Ukraine are still reeling from their first overt military confrontation since the 1991 collapse of the Soviet Union, a clash Sunday in the Kerch Strait near Russia-occupied Crimea.

"Everything depends on the accounts of events and the actions of both sides".

Kudlow said the administration has been "extremely disappointed" by China's engagement in trade talks but the meeting between Trump and Xi on the sidelines of the G-20 summit could be a game-changer.

When asked at a White House news briefing Tuesday whether Trump would condemn acts of Russian aggression against Ukraine, National Security Adviser John Bolton replied, "We'll stand on" Haley's comments at the United Nations.

The strait is the only route for ships traveling between the Black Sea and the Sea of Azov, where Ukraine has several ports.

One more of the systems would be joining three others already deployed in Crimea, they said.

A Kremlin aide said on Wednesday that Putin had rebuffed an initiative from Poroshenko for the two men to speak by phone.

Meanwhile, U.S. State Department spokeswoman Heather Nauert urged European states to do more to support Ukraine and said Washington wants to see tougher enforcement of sanctions against Russian Federation.

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