It followed days of outrage at images of dead children and victims suffering convulsions from the suspected sarin gas attack in the rebel-held town of Khan Sheikhun.
"Those attacks did not reduce the regime's ability (to) kill civilians".
Turkey remains committed to a ceasefire in Syria, but Russian Federation must stop insisting that Bashar al-Assad should remain in office, Turkish Foreign Minister Mevlut Cavusoglu said on Sunday.
"Instead of an overworked statement about a joint fight against the biggest enemy, ISIS (the Islamic State), the Trump administration proved that it will fiercely fight the legitimate Syrian government", Medvedev wrote.
The chemical attack on Monday killed at least 80 people in the northwestern part of Syria and led to the U.S. launching more than 50 Tomahawk missiles from warships stationed in the Mediterranean at a Syrian airfield.
The raid [on Friday] was the first time USA forces have directly attacked Syrian government positions.
"Developments in Syria have changed the situation fundamentally", he said. Press Secretary Sean Spicer said President Donald Trump would not "telegraph his next move".
Pressed to clarify, McMaster said the goals of fighting IS and ousting Syria's president were somewhat "simultaneous" and that the objective of the missile strike was to send a "strong political message to Assad" to stop using chemical weapons.
The strikes the USA carried out after a deadly chemical attack were a clear signal to Syrian President Bashar al-Assad, the White House said Friday as Russian Federation warned against risks of a looming wider conflict, APA reports quoting Anadolu Agency.
But there have been repeated allegations of chemical weapons use since.
Trump added that all "civilized nations" should join the United States "in seeking an end to the slaughter and bloodshed in Syria".
Today, thousands of Russian forces operate throughout Syria, and not chiefly against the Islamic State but against the civilian population and the US -backed moderate opposition.
Many American allies voiced support for the airstrikes.
On Thursday, after the gas attack but before the USA strike, Tillerson signaled that Washington wished to see Assad gone, following an apparent softening in tone towards the Syrian president the week before.
Turkish President Recep Tayyip Erdogan called the airstrikes, a "concrete step against the Assad regime's war crimes using chemical and conventional weapons".
The airstrikes received support from a number of USA congressional leaders, including House Speaker Paul Ryan and Senate Minority Leader Chuck Schumer.
Several lawmakers said Sunday that decision shouldn't entirely be up to Trump.
House Minority Leader Nancy Pelosi said Trump must officially seek congressional approval if he "intends to escalate the USA military's involvement in Syria". But at the very least US friends and allies in the Middle East and in Eastern and Central Europe have questioned how serious the United States is about countering aggression.
The foreign secretary has called off a visit to Moscow in the wake of the Syrian chemical weapons attack.
Meanwhile, Assad's allies reportedly threatened retaliation if the US strikes again.
Asked by host George Stephanopoulos if he was saying that there had been no change in U.S. posture on the use of force against Assad, he agreed.
Iran, also an Assad ally, said it strongly condemns the missile strikes against the Syrian army's Shayrat air base. As Secretary of State Rex Tillerson was making the Trump administration's first official trip this week to Russia, McMaster said Russia will have to decide whether it wanted to continue backing a "murderous regime".
Boris Johnson was due to be the first British cabinet member to visit the Kremlin since 2012, after the Foreign and Commonwealth Office (FCO) made a sustained attempt to improve relations with Moscow.
In an interview with Turkish broadcaster Fox TV, Kurtulmus said Assad´s government must be punished in the worldwide arena and the peace process in Syria needed to be accelerated.
There is no rational reason, Black added, to back accusations that Assad used chemical weapons against civilians as strategic means to defeat opposition forces. Bolivian Ambassador Sacha Lorenti said the United States behaved like "investigator, attorney, judge and executioner".
North Korea Could Conduct Nuclear Test On Day Of Celebration
The president also tweeted that if China does not do its part to rein in Pyongyang's nuclear ambitions, the U.S. can handle it. Every male in the country is required to undertake some form of military training and can be called to serve at any time.
Steve Bannon Not Quitting White House, 'I Love a Gunfight'
Joseph Dunford, chairman of the Joint Chiefs of Staff, will now be regular attendees again at the principals committee of the NSC. The other members added to the Principals Committee include Energy Secretary Rick Perry and CIA Director Mike Pompeo.
"I said it was obsolete. It's no longer obsolete".
CORNISH: White House officials say Trump's support for North Atlantic Treaty Organisation has been reinforced by Russia's actions. Candidate Trump regularly denounced China as a currency manipulator. "Conditions do change, and you have to change with them".
French prosecutors ask EU to lift Le Pen's immunity
If elected president - a scenario analysts deem unlikely but not impossible - Le Pen would have immunity from prosecution. Fillon has a chance to take 10% of the electorate of Macron and six percent of Le Pen.