Rex Tillerson: US will fight crimes against innocents anywhere

A site hit by airstrikes on Tuesday in the town of Khan Sheikhoun in rebel-held Idlib

"He must now understand that Assad is now toxic in every sense".

"Either they knew that there were chemical weapons and they knew there was going to be chemical weapon use, and they just hid it from the global community, or they are being played for fools by Assad - by him having chemical weapons and they're just in the dark and they don't know anything about it", she said.

"The sight of people being gassed and blown away by barrel bombs ensures that if we see this kind of action again, we hold open the possibility of future action", White House spokesman Sean Spicer told reporters.

Experts quickly cast doubt on Russia's explanation for Syria's worst chemical attack since 2013, when Assad, an ally of Russian President Vladimir Putin, is believed to have used sarin gas to kill as many as 1,400 people in the outskirts of Damascus, Syria's capital. "We can walk and chew gum".

After the April 4 chemical attack, Trump said his attitude toward Assad "has changed very much" and Tillerson said "steps are underway" to organize a coalition to remove him from power. The official said it still isn't clear who was flying the jet that bombed the hospital, because the Syrians also fly Russian-made aircraft.

Trump discussed Syria during separate telephone calls Monday with British Prime Minister Theresa May and German Chancellor Angela Merkel.

He says he agrees with other European Union leaders that Russian Federation needs to be part of the solution in Syria, but must abandon its support for President Bashar Assad to do so.

"We rededicate ourselves to holding to account any and all who commit crimes against the innocents anywhere in the world", Tillerson said Monday while visiting Sant'Anna di Stazzema, a Tuscan village where the Nazis massacred more than 500 civilians during World War II.

Italian Foreign Minister Angelino Alfano, who hosted the G-7 gathering, said "there is no consensus for further new sanctions".

The annual two-day meeting had initially been expected to focus on talks with Tillerson about hotspots like Libya, Iran and Ukraine.

Iranian Foreign Minister Mohammad Javad Zarif, whose government is another backer of Assad's, also called for an independent inquiry under United Nations auspices when he spoke Monday to Alfano, Italy's foreign ministry said in a statement.

"We are calling on Russian Federation and Iran to do everything possible to bring about this settlement and to work with the worldwide community to ensure last week's shocking events aren't repeated".

French Foreign Minister Jean-Marc Ayrault said the pressing task for the G7 was to "find a political solution, a political transition" in Syria, particularly if the West wanted to triumph over the Islamic State group.

In addition to G-7 countries, diplomats at the summit are attending from Jordan, Qatar, Saudi Arabia, Turkey, the United Arab Emirates and others.

Putin spoke before US Secretary of State Rex Tillerson was due to arrive in Moscow for talks with Russia's foreign minister.

According to The Times, "Britain is pushing western nations to impose new sanctions on Russian Federation if it fails to cut ties with President Assad as the conflict over Syria escalates". And so Russian Federation can be a part of that future and play an important role. He said they were "planning to plant certain substances and accuse Syrian authorities of using them", and called on the global community to investigate.

Mr Trump ordered a strike by 59 cruise missiles on the base in America's first direct attack against the Syrian government.