She said: “We’re calling (Russia and Iran) out. But I don’t think anything is off the table at this point. I think what you’re going to see is strong leadership. You’re going to continue to see the United States act when we need to act.”

President Trump ordered a US military strike on the air base where the chemical attack carried out last week was said to have been launched. US officials have blamed Syrian President Bashar al-Assad for the attack and slammed Iran and Russia for supporting him.

However, Russia is denying involvement and said that there is no proof that chemical weapons were even at the air base. Haley disputed this saying that there was evidence: “What we’ve seen is, you know, in our meetings this week, we were told of the evidence. We saw the evidence. The President saw the evidence. All of that is naturally classified. And I’m sure when they can declassify that, they will.”

She also repeated the warning she gave the day after the strike: “I was trying to give warning and notice to the members of the Security Council and the international community that (Trump) won’t stop here. If he needs to do more, he will do more.”

Rex Tillerson, the US Secretary of State, will be meeting his counterparts in Moscow this week and he said he is going to question them about their commitments: “Yes, that will be part of the discussions when I visit Moscow next week is to call upon Foreign Minister (Sergey) Lavrov and the Russian government to fulfil the obligation it made to the international community when it agreed to be the guarantor of the elimination of the chemical weapons. And why Russia has not been able to achieve that is unclear to me. I don’t draw conclusions of complicity at all, but clearly they’ve been incompetent and perhaps they’ve just simply been out-manoeuvred by the Syrians.”

H.R. McMaster, President Trump’s national security adviser, said that recent events have turned into an opportunity for Russia. He said: “Well this is part of the problem in Syria, is Russia’s sponsorship of this murderous regime. And so we would want to appeal rationally to Russia — this is a great opportunity for the Russia leadership to re-evaluate what they’re doing. Why they’re supporting a regime that commits mass murder against its own people.”