Trump even called Syrian President  Bashar al-Assad as a 'Gas Killing Animal'.

"Russia vows to shoot down any and all missiles fired at Syria. Get ready Russia, because they will be coming, nice and new and 'smart!' You shouldn’t be partners with a Gas Killing Animal who kills his people and enjoys it!," Trump tweeted.

Trump said relationship between his nation and Russia is currently 'worse'.

"Our relationship with Russia is worse now than it has ever been, and that includes the Cold War. There is no reason for this. Russia needs us to help with their economy, something that would be very easy to do, and we need all nations to work together. Stop the arms race?," he said.

Trump made the remarks in the backdrop of the alleged chemical attacks which took place in Syria last week and killed several people.

BBC reported: "President Bashar al-Assad's government - which receives military backing from Russia - denies being behind any chemical attack."

Meanwhile, Russia has warned the US against military action in Syria, in response to the alleged chemical attack which took place last week, reports said on Wednesday.

Moscow's UN envoy Vasily Nebenzia and his US counterpart Nikki Haley reportedly had a heated exchange over the issue during a meeting of the UN Security Council on Tuesday.

Making Russia's intentions clear, Nebenzia said, "I would once again beseech you to refrain from the plans that you're currently developing."

Russia also vetoed a proposal to open a new inquiry into the alleged chemical attack in Syria.

After the US-drafted resolution failed to pass at the UN Security Council, Haley accused Russia of failing the Syrian people

"At a certain point you’re either for an independent and impartial investigation, or you’re not. Today for the 6th time Russia failed the Syrian people and vetoed a mechanism that would have held those who use chemical weapons against them accountable," she wrote on Twitter.

Last week, French president Emmanuel Macron and his US counter Donald Trump had condemned the chemical attack in a joined statement.

Both Macron and Trump had vowed a determined response.

"Both leaders strongly condemned the horrific chemical weapons attacks in Syria and agreed that the Assad regime must be held accountable for its continued human rights abuses. They agreed to exchange information on the nature of the attacks and coordinate a strong, joint response," read a statement issued by the White House. 

Meanwhile, reports have stated that Trump is in conversation with both France and the UK, paving a way for a co-ordinated military attack from the West.