US officials said Saturday that they believed the strikes would prevent future chemical attacks by the Syrian regime, but warned that the USA was prepared to "sustain" its operation if Assad continues his aggressions.
Russian news agencies reported that Russian President Vladimir Putin, in a phone call, told Iranian President Hassan Rouhani there would be chaos in global relations if there are further Western strikes on Syria.
It said no deaths from mechanical injuries were visible and all symptoms were characteristic of a chemical weapons attack, particularly choking agents and organophosphorus agents or hydrocyanic acid.
"We're not going to leave until we know we've accomplished those things", she said.
Hungarian Prime Minister Viktor Orban's office said on Monday an "irresponsible" migration policy on the part of the European Union.
"We'll see how smart he is", Haley said.More news: Kendrick Lamar is a Pulitzer Prize victor
Russian Foreign Minister Sergey Lavrov said last week his country had sent experts to the site and found "no trace" of chemical weapons use.
U.S., French and British missiles destroyed sites suspected of hosting chemical weapons development and storage facilities Saturday, but the buildings were mostly empty and the Western trio swiftly reverted to its diplomatic efforts.
The chemical attack which has so far been denied by the Russian-backed Bashar al-Assad regime has sparked worldwide condemnation and calls for military intervention.
The group's director-general, Ahmet Uzumcu, said Syrian and Russian officials cited "pending security issues" in keeping its inspectors from reaching Douma.
Douma was the last rebel holdout in the eastern Ghouta suburbs, the target of a massive government offensive in February and March that killed hundreds of people and displaced tens of thousands. U.S. Ambassador to the United Nations Nikki Haley has indicated new economic sanctions will be announced Monday against Russian Federation for enabling Assad's government to continue using 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 disgusting, miserable way".
"Chemical weapons were used on Syrian men, women, and children in #Douma".More news: National Weather Service: EF-1 tornado hit Upshur, Harrison counties
The US ambassador to the United Nations, Nikki Haley, said on Sunday the United States would announce new economic sanctions aimed at companies dealing with equipment related to Assad's alleged use of chemical weapons.
"We are still conducting a more detailed damage assessment, but initial indications are that we accomplished our military objectives without material interference".
President Donald Trump has informed Congress in writing of his decision to order a US missile strike against Syria.
The Western leaders were also facing scrutiny at home over their actions. The OPCW is set to meet in the Hague on Monday over the attack, although there have been no signs yet that the investigators have travelled to Douma to begin their fieldwork.
Her comments follow allegations by the head of an worldwide chemical weapons watchdog on Monday that Syrian and Russian officials cited "pending security issues" to keep independent inspectors from reaching the site of the suspected April 7 chemical attack.
Trump did not rule out additional strikes, saying he would take additional action "as necessary and appropriate".More news: Don't Buy or Eat Romaine Lettuce Right Now, Consumer Reports Warns