This was reported by the US Embassy in Ukraine.

"US citizens need to be aware of reports that Russia is planning significant military action against Ukraine. "US citizens should also remember that security conditions, especially along Ukraine's borders, in the Russian-occupied Crimea and in the Russian-controlled eastern part of Ukraine, are unpredictable and could deteriorate without warning," the statement said.

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The US State Department warns that the Russian authorities in Crimea "arbitrarily imprison foreigners and locals, especially those who are considered opponents of Russia's occupation of the peninsula".

The document also states that the US government forbids its employees to travel to the occupied Crimea.

What is known

• Russia continues to build up troops near Ukraine's borders, despite a video conference on December 7 that US President Joe Biden called on Russian President Vladimir Putin to de-escalate the conflict. Russia suspends and changes the schedule of commercial air and rail flights for the transportation of personnel and Russian military equipment. US and Ukrainian officials have evidence of this.
• On December 16, the European Parliament passed a resolution condemning Russia's aggression against Ukraine and its military maneuvers on the border.
• On 16 December, at a joint press conference with Ukrainian President Volodymyr Zelensky, NATO Secretary General Jens Stoltenberg said that if there was aggression against Ukraine in the future, it would have severe consequences and a very high price.
• The G7 countries promise Russia "serious costs" in the event of its invasion of Ukraine.

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