This comes after U.S. President Donald Trump warned Russian Federation on Wednesday of imminent military action in Syria over a suspected poison gas attack, declaring that missiles "will be coming" and lambasting Moscow for standing by Bashar Assad.
The tweet came after the Russian ambassador to Lebanon said in an interview on Tuesday with Hezbollah-owned al-Manar TV that "if there is a U.S. missile attack, we - in line with both Putin and Russia's chief of staff's remarks - will shoot down USA rockets and even the sources that launched the missiles".
In a hardly surprising admission, an oft-cited Free Syrian Army (FSA) commander said the possible strike against Syria mulled by US President Donald Trump would play into the hands of militants seeking to topple Syrian leader Bashar Assad.
President Trump warned Russian Federation not to support President Assad, referring to him as the "gas killing animal".
The Organisation for the Prohibition of Chemical Weapons (OPCW) has since said it is deploying a fact-finding mission to Douma, the scene of a suspected chemical attack that reportedly killed at least 49 people and injured hundreds on Saturday.
Mr Trump sent a second tweet shortly after, saying the relationship between the U.S. and Russian Federation was "worse now than it has ever been, and that includes the Cold War". There is no reason for this.
And Russian Army Gen. Valery Gerasimov also warned the U.S. Tuesday, if it were to launch airstrikes against Syria.
In London, Mrs May said all the indications pointed to Syrian government responsibility for the Douma attack.
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In the video, the singer can be seen singing on a stage at the ceremony venue, but then crumples to the ground after being shot. The footage shows the woman performing a song sitting on a stage, with several musicians behind her.
"This is about humanity, we're talking about humanity, and it can't be allowed to happen", he said.
Media reports implied that Trump and his advisers had been considering a "powerful" military response to the alleged use of a chlorine bomb, deeming it the only credible way to deter further chemical attacks.
European airspace authorities have warned aircraft to be careful over the next days when flying close to Syria because of possible military action against Mr Assad's forces. It was the 12th time that Kremlin used its veto power to a stop a resolution targeting the Assad regime.
It prompted a slew of Russian comments that warned that United States strikes could trigger a direct military clash between the two former Cold War adversaries.
Trump and British Prime Minister Theresa May called for action against Assad and his supporters in the aftermath of the attack.
Syria's foreign ministry said Washington is using the alleged chemical attack as a pretext to target Syria.
If such threats from the United States and its allies, France and Britain, are meant to stop Damascus from fighting terrorism, "they are delusional", the statement also said. Spokeswoman Maria Zakharova posted that "missiles must fly towards terrorists, not a legitimate government that has been fighting worldwide terrorism in its territory for several years".