"And saying, 'we are only going after chemical weapons areas, ' ignores the enormity of the problem", he said.

Britain said on Sunday Russia bore responsibility by proxy for civilian deaths in Syria last week caused by a poison gas attack that Washington says was carried out by the Moscow-backed government of Syrian President Bashar al-Assad.

Her words, however, came a day after she said Washington was ready to take additional action after a solo USA strike on a Syrian air base.

"This is something to let Russian Federation know, 'You know what?" The speed which the missile attack on Shuairat was welcomed and endorsed by key allies, notably Great Britain and France, indicates that North Atlantic Treaty Organisation supports Trump's decision to end American passivity with regard to Syria.

Russian President Vladimir Putin and Iran's Hassan Rouhani said in a phone call that aggressive USA actions against Syria were not permissible and violated global law, the Kremlin said on Sunday.

Thursday's strike "was related exclusively to the most recent horrific use of chemical weapons", Secretary of State Rex Tillerson told ABC News' George Stephanopoulos on Sunday.

"It's important that we keep our priorities straight", said Tillerson. "We are prepared to do more".

On Thursday, the USA fired almost 60 Tomahawk missiles at a Syrian airfield where planes allegedly took off from to launch a chemical weapons attack.

The decision by Johnson to cancel a visit to Moscow later this month shows a lack of understanding of events in Syria, Russia's Foreign Ministry said on Sunday.

Speaking on CBS's Face The Nation, Mr Tillerson said there was no evidence to suggest Russian Federation was part of the alleged chemical attack.

Secretary of State Rex Tillerson on ABC's "This Week" Sunday that there was "no change" in the US military posture toward Syria despite the Thursday airstrike against a Syrian air base in response to a chemical attack days earlier that killed at least 87 civilians. Earlier, U.S. military officials had said they were looking into whether Russian Federation participated, possibly by using a drone to help eliminate evidence afterward.

The secretary of state said the US priority remains to defeat ISIS.

Sen. Marco Rubio, R-Fla., said he supports military action to stop Assad from gassing his own people and believes the Trump has the legal authority to strike.

The U.S. says the strike was in response to a nerve gas attack on the rebel-held town of Khan Sheikhoun last week, which has been widely blamed on government forces.

McMaster, Cornyn and Cardin spoke on "Fox News Sunday", Tillerson appeared on ABC's "This Week" and CBS' "Face the Nation", Haley and Graham were on NBC's "Meet the Press" and Haley also appeared on CNN's "State of the Union".