Russia and Iran affirm commitment to Syrian government
Russia and Iran have renewed their support for the Syrian government, saying the US missile strike violated Syrian sovereignty but failed to boost the morale of "terror groups" in the war-torn country.
In a phone call with Syrian president Bashar Assad, Iranian president Hassan Rouhani called Friday's strike a "blatant violation" of Syrian sovereignty, Syrian state media reported.
Mr Assad accused the US of trying to boost the morale of "terror groups" in Syria.
The government refers to all those fighting against it as terrorists.
A statement carried on the military media arm of Hezbollah condemned the American strike in much stronger language, saying it had "crossed red lines" and vowing to "reply with force" to any future aggression "in a variety of ways".
The Lebanese militant group has invested thousands of fighters in the defence of Mr Assad's government.
The statement was made in the name of a previously unheard of "shared operations room" between Russia, Iran and allied forces.
There was no comment from Russia or Iran about the statement.
The Kremlin said in a statement Mr Rouhani also spoke with Russian president Vladimir Putin by phone.
"Both sides noted the inadmissibility of aggressive US actions against a sovereign state in violation of international law," the statement said.
"Vladimir Putin and Hassan Rouhani spoke in favour of an objective, unbiased investigation of all the circumstances of the chemical weapons incident on April 4 in the Syrian province of Idlib."
Mr Rouhani said the US strike would not affect Iran's Syria policy, while Supreme Leader Ayatollah Ali Khamenei said Iran would not withdraw in the face of similar aggressions.
"What the Americans did is a strategic mistake and offence.
"They are repeating the offence of their predecessors," Mr Khamenei was quoted as saying by the official IRNA news agency.
Iran has provided crucial military and economic assistance to Mr Assad throughout Syria's six-year civil war.
It has organised several Shiite militias from around the Middle East to fight in support of Mr Assad's government and has sent troops and officers from its own Revolutionary Guards.
The US 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.
The Syrian government has denied using chemical weapons.
US secretary of state Rex Tillerson denied in an interview on CBS's Face The Nation that the strikes signalled an overhaul of American policy, saying its priority remained to defeat Islamic State militants in the Middle East.
The strike was the first time American forces targeted a Syrian government installation in the course of the war.
US Treasury officials say they are preparing sanctions in response to the chemical weapons attack, although the Syrian government is already buried under US and EU sanctions.
Mr Tillerson will meet with Russian foreign minister Sergey Lavrov in Moscow later this week.
Moscow has been a steadfast ally of the Syrian government and has defended it against claims of chemical weapons use in front of the UN Security Council.
A Syrian Sukhoi jet took off from the Shayrat airbase targeted by the volley of US strikes, Hezbollah's al-Manar TV channel reported on Sunday, saying repairs to the base began within hours of the attack.
Turkish foreign minister Mevlut Cavusoglu played down concerns of a rift with Russia over Ankara's support for the strike, saying Turkey was committed to the cease-fire mechanisms it has developed with Russia for Syria.
Turkey provides military support to some of Syria's opposition forces.
But he said Turkey could not "remain silent" on the Syrian government's chemical weapons use, and insisted Moscow work with Ankara to establish a transitional government in Damascus.
"We want to continue our efforts with Russia in the Astana process in terms of measures to increase trust and establish a cease-fire," he told reporters in Antalya, according to the Anadolu state news agency.
In the days after the Khan Sheikhoun attack, Turkey provided the Syrian Civil Defence search and rescue outfit with 50 protective kits for responding to chemical attacks, and trained them in their use, Anadolu said.