He said the allies acted without a United Nations mandate because of the "constant stalemate of the Russians" in the Security Council.
Its fact-finding team reached Syria on Saturday, the day of the US-led airstrikes against Syrian government targets in response to the April 7 attack. They said Haley is one of the most disciplined and cautious members of the Cabinet, especially when it comes to her public appearances. In its agreed conclusions, the ministers said the European Union "stands united in its support for the total prohibition and elimination of chemical weapons worldwide".
Multiple experts say the strikes were carefully coordinated to avoid escalating the United States' role in the ongoing conflict.
Britain, France and the United States all say Syrian President Bashar al-Assad's forces were responsible for using chemical weapons in Douma, which Syria and Russian Federation deny. She called on Russian Federation and Iran to use their influence as allies of Syrian President Bashar al-Assad to "start serious and meaningful discussions under United Nations auspices in Geneva".
The fact-finders arrived in Damascus on Saturday but the OPCW said their visit to Douma had been delayed by Syrian and Russian officials citing "pending security issues".
On April 6, the US Treasury Department added 38 Russians, senior officials, and companies on its sanctions list, in response to Moscow's alleged "malign activity".
Lavrov also denied the use of chemical weapons in Douma and said the event did not take place.
The deputy foreign minister also said that the politicians from Russian Federation were discussing USA "abuse of the dollar's status as the global currency, RIA quoted Ryabkov as saying".
The British envoy to the OPCW said it had recorded 390 allegations of the use of banned chemicals in Syria since 2014, and that a failure by the OPCW to act risked allowing "further barbaric use of chemical weapons".
Meanwhile, UK Prime Minister Theresa May on Saturday said the military strikes on Syria were not about regime change, but about sending a clear message that the global community will not stand by and tolerate the use of chemical weapons. "There is broad-based global support for the action we have taken", May said.
She said, "These strikes are about deterring the barbaric use of chemical weapons in Syria and beyond". "Therefore allegations of this towards Russian Federation are groundless", Peskov said.
"Unfettered access essential. Russia & Syria must cooperate", tweeted the account of the British team with the OPCW, expressing concern that access to Douma was being denied.
But on Monday, senior lawmakers in the lower house of parliament, the State Duma, made a decision to hold off until May 15 before considering any counter-sanctions against the United States.
The organization, which needs a two-thirds majority to make decisions, has been undermined by deep political division over the use of chemical weapons by the Syrian government.
The attack also hit a site in Masyaf, about 170 km (100 miles) north of Damascus, army depots in the eastern Qalamoun region northeast of the capital, the Kisweh area south of Damascus, and a site in the Qasyoun hills overlooking the capital.