Russia has rejected President Trump's "ultimatum" for Moscow to sign a ceasefire deal to end the war in Ukraine within 50 days on Tuesday as "unacceptable," calling for continued negotiations and insisting that the invasion ordered by President Vladimir Putin would continue until its goals are achieved.

In response to President Trump's threat to impose 100% secondary tariffs on countries that do business with Russia if Putin's government does not agree to a deal to end the war in that timeframe, Deputy Foreign Minister Sergey Ryabkov said Tuesday that "any attempts to make demands, especially ultimatums, are unacceptable to us," according to Russia's state-run TASS news agency.

"We need to focus on political and diplomatic work. The President of the Russian Federation has repeatedly said that we are ready to negotiate and the diplomatic path is preferable for us," Ryabkov was quoted as saying. "If we cannot achieve our goals through diplomacy, then the SVO (war in Ukraine) will continue… This is an unshakable position. We would like Washington and NATO as a whole to take it with the utmost seriousness."