Assad speaks with Iran's president, who affirms support

Tillerson made clear that the USA objective was limited to deterring further chemical attacks, saying, "Other than that, there is no change to our military posture".

But he also said there had been "no change to our military posture" in Syria following the USA retaliatory strike and that Washington's "first priority" in Syria was to defeat so-called Islamic State (IS).

The official said a drone operated by Russians was flying over a hospital as victims of the attack were rushing to get treatment.

United States ambassador to the United Nations Nikki Haley explained on NBC's "Meet the Press" Sunday that President Donald Trump made a decision to act last week and send missiles into Syria because "enough if enough".

Former U.S. Ambassador to Syria Robert Ford says the agreement to prevent chemical weapons use in Syria failed because Russian Federation didn't keep their end of the bargain.

He said it was time for Russian President Vladimir Putin "to face the truth about the tyrant he is still propping up".

USA ambassador to the United Nations Nikki Haley said on Friday the Trump administration was ready to take further steps if needed.

For a start, under President Donald Trump the USA has been seeking for some time to play a more prominent role in the beleaguered country in line with its own agenda.

White House press secretary Sean Spicer just announced a policy that would mean constant and unending USA involvement in Syria's civil war - if the Trump team is actually serious about it.

Reluctant to put significant troops on the ground in Syria, the USA for years has struggled to prevent Assad from strengthening his hold on power. She said late last month that "our priority is no longer to sit there and focus on getting Assad out". United States officials believe the hospital was targeted in an attempt to hide evidence of the chemical attack.

"This is part of the problem in Syria". "Russia must show the resolve necessary to bring this regime to heel". They all fully support it.

"President Obama made the case, 'Look, I didn't act after the last big chemical attack in 2013 because instead I got something better; I got Russian Federation to help remove a lot of these chemical weapons out of Syria, '" O'Donnell said.

"They are repeating the offence of their predecessors", Mr Khamenei was quoted as saying by the official IRNA news agency. "They're saying by covering for Assad that they knew that it was there, or they were incompetent by having chemical weapons there in the first place".

Tillerson stressed, however, that he has no "hard evidence" leading him to believe Russian Federation played an active role in the chemical attack.

Global development secretary Priti Patel said Mr Johnson was focused on working with allies to find a solution to the crisis. He did not specify the action.

The United States has conducted air strikes against Islamic State, which controls territory in eastern and northern Syria, and a small number of U.S. troops are helping rebel militias.

Interviewed on CNN yesterday she added that "getting Assad out is not the only priority" as the U.S. was "obviously" trying to defeat Islamic State, too. And so what we're trying to do is obviously defeat the IS.