Moscow (CNN) Russia's deputy prime minister ridiculed President Donald Trump's Twitter diplomacy Friday, saying that international relations should not depend on any individual's frame of mind.

"We cannot depend on the mood of someone on the other side of the ocean when he wakes up, on what a specific person takes into his head in the morning," Arkady Dvorkovich said, according to the Russian state-run news agency RIA Novosti.

He did not specifically name Trump, but the US leader did threaten military action against Syria in early-morning tweets this week.

As the United States considers its response to a suspected chemical attack last week in Douma, Syria, Trump's threats against Syria and Russia have been made almost entirely on Twitter.

Russia, the Syrian regime's most powerful ally, has denied a chemical attack took place and warned it would shoot down any US missiles fired over Syria, raising concerns of a US-Russia confrontation.

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