US President Donald Trump issued a stern warning to Russia on Wednesday, tweeting that missiles “will be coming” in response to the weekend chemical attack in the Syrian town of Douma in Eastern Ghouta that killed at least 40 people and sparked global outrage. "Russia vows to shoot down any and all missiles fired at Syria," Trump tweeted. "Get ready Russia, because they will be coming, nice and new and smart! You shouldnt be partners with a Gas Killing Animal who kills his people and enjoys it!" Trump did not detail what a strike would look like, or whether these would be US missiles. The tweet came as Trump administration officials have consulted with global allies on a possible joint military response to Syrias poison gas attack. Trump canceled a foreign trip in order to manage a crisis that is testing his vow to stand up to Syrian regime head Bashar Assad. Russia was quick to respond to the tweets, with the Foreign Ministry saying the "smart" missiles that Trump has promised to send to Syria will destroy evidence of a chemical weapons attack. Maria Zakharova, spokeswoman for the Russian Foreign Ministry, in a Facebook post later on Wednesday wondered if the chemical weapons watchdog investigating the reports has been warned that the missiles will destroy "all evidence" of the attack. She added: "Or is it the original idea to use the smart missiles to sweep the traces of the provocation under the rug?" Trump followed up his tweets, by saying that US-Russian relations are "worse now" than ever, "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 tweeted. Russian lawmakers have warned the United States that Moscow would view an airstrike on Syria as a war crime, saying it could trigger a direct military clash between the two former Cold War adversaries. Russias ambassador to Lebanon said any missiles fired at Syria would be shot down and the launching sites targeted — a stark warning of a potential major confrontation in Syria. The US, France and Britain were in extensive consultations about launching a military strike as early as the end of this week, US officials have said. None of the three countries leaders had made a firm decision, according to the officials, who were not authorized to discuss military planning publicly. A joint military operation, possibly with France rather than the US in the lead, could send a message of international unity about enforcing the prohibitions on chemical weapons and counter Syrias political and military support from Russia and Iran. President Emmanuel Macron said France, the US and Britain will decide how to respond in the coming days. He called for a "strong and joint response" to the attack in Douma on Saturday, which Syrian activists and rescuers said killed 40 people. The Syrian regime denies responsibility. Trump suggested Monday he had little doubt that regime forces were to blame for the attack.