The U.S., United Kingdom and France said they launched airstrikes against Syrian chemical sites after obtaining evidence that a chemical weapon was used by President Bashar Assad's government.
He also offered to play the role of intermediary between the United States and Russian Federation, whose relationship has been on edge over the chemical weapons attack and amid allegations that Russian Federation tried to interfere in the USA 2016 presidential election.
OPCW inspectors were visiting sites in Douma on Monday aiming to collect samples, interview witnesses and document evidence to determine whether banned toxic munitions were used.
Joint airstrikes were launched in Syria by the US, UK and France on Saturday as punishment for a suspected chemical weapons attack in Douma.
OPCW inspectors arrived in Damascus on Saturday and had planned to head to Douma, on the outskirts of the capital, on Monday.
His deputy minister, Sergei Ryabkov, said the mission can not access the site without a United Nations permit.
According to NATO's disinformation monitors in Europe, they have seen a concerted effort by Russian Federation to deny the Douma attack took place.
The United States, Britain and France fired more than 100 missiles at three alleged chemical weapons facilities early Saturday, angering Syria's military backer, Moscow, which threatened to retaliate.
"Unfettered access is essential", the British delegation said in a statement.
According to Hamilton 68, a website set up by researchers working with the Alliance for Securing Democracy, a transatlantic project set up to counter Russian disinformation campaigns - Syria is the leading hashtag on social media accounts identified as part of Russia-linked influence networks.
When asked on "Fox News Sunday" about "how our relationship with Russian Federation has changed this week", Haley said that relations are "very strained".
The OPCW inspectors will not assign blame for attacks. The Syrian government and its Russian ally deny involvement in any such incident.
Haley made the remarks in an interview on CBS, saying the Treasury Department would announce the new sanctions and insisted the USA has sent "a strong message" about the use of chemical weapons.
British Foreign Secretary Boris Johnson made this clear on Monday as he arrived at a meeting of European Union foreign ministers in Luxembourg, telling reporters: "I'm afraid the Syrian war will go on in its awful, miserable way".
The Prime Minister will tell MPs that the strikes were in the national interest because the use of chemical weapons can not be normalised, including in the UK.
"I think they're feeling that".
"And so I think everyone is going to feel it at this point", Haley said on the show.
The allies could not wait "to alleviate further humanitarian suffering caused by chemical weapons attacks", according to excerpts of her speech.
"Our job was never to take Assad out", Haley said, referring to Syrian President Bashar al-Assad.
But she will be questioned over why she did not seek parliamentary approval for the action, a decision that she and her ministers say was driven by the need to act quickly.
Prime Minister Edouard Philippe on Monday will respond to their criticism in a debate in parliament on Monday afternoon.
The statement came hours after French President Emmanuel Macron asserted that Paris had convinced Trump to stay engaged in Syria "for the long-term".