The Kremlin said on Wednesday it continues to monitor statements by U.S. President Donald Trump regarding sanctions against Moscow, but that Russia had acquired immunity to such measures thanks to long experience.

Earlier this month, Trump set a 50-day deadline for Russia to accept a ceasefire. Failure to do so, the president said, would prompt punishing new economic measures, among them secondary sanctions on nations doing business with Moscow.

The move means Trump is walking back the 50-day deadline he set this month in response to Russia's continued bombing of Ukrainian cities.