The Kremlin dismissed claims that Russian Federation was impeding access. That had led to feverish speculation on Russian television, and from some Russian politicians, that a USA strike on Syria could quickly devolve into a nuclear standoff as unsafe as the Cuban missile crisis.
Western powers are thought to be preparing for strikes but Russian Federation, a Syrian ally, opposes such action.
In interviews broadcast by the pro-government Al-Ikhbaria television channel, 13 medical workers, including nine doctors, said the symptoms they treated suggested that the patients were suffering from asthma, not the effects of a poison gas.
"Did a chemical weapons attack happen?" And it shows that Washington appears to have succeeded for now in delivering a blow that did not provoke Russian Federation into a military response - even though the degree to which the missile attack hindered Assad's chemical-weapons capability is far from clear.
Vassily Nebenzia, Moscow's U.N. ambassador said he "cannot exclude" war between the United States and Russian Federation.
He also called attention to the fact that Eastern Ghouta was already practically liberated, at that moment and an agreement had been reached with the last groups of militants in Douma; that they had been provided with a secure humanitarian corridor for the departure to Idlib province for both themselves and their families.
A Russian defense ministry official said later the OPCW experts would travel to Douma on Wednesday.
The U.S., France and Britain have been consulting about launching a military strike in Syria.
Putin said the U.S. actions in Syria made the humanitarian catastrophe worse and caused pain for civilians.
Erdogan also told reporters on Friday that tensions between the two countries over a suspected chemical attack in the Damascus suburb of Douma now seem to have eased.
Mr Joyce said: "When we see malicious cyber activity, whether it be from the Kremlin or other nation state actors, we are going to push back". Erdogan did not elaborate.
At the meeting, the fifth in a week on chemical weapons in Syria, Russia and its supporters again clashed with the US and its allies over a suspected poison gas attack on April 7 in the Damascus suburb of Douma.
Lavrov also said the Russian experts have inspected the site of the alleged attack in Douma, just east of Damascus, and found no trace of chemical weapons. Syria's government denies responsibility.
The Russian Envoy to OPCW said that chemical weapons provocation in Syria was carried out by non-governmental organizations that the United Kingdom and the USA paid for cooperation.
Yildirim on Friday again condemned the "heinous" the attack in Douma and said the perpetrators should "pay a price".
Syrian flags flew in Douma on Monday, security forces stood on street corners and Russian military police patrolled the streets.
Russian and Syrian troops have since deployed in the area, which the Syrian army declared fully under government control on Sunday.
He reaffirmed Russia's view that a purported chemical attack in the Syrian town of Douma that prompted the strike was a fake.
Speaking to reporters in Moscow, Lavrov reiterated a strong warning to the West against military action in Syria.
He said that "intelligence agencies of a state that is now striving to spearhead a Russo-phobic campaign were involved in that fabrication".
He did not elaborate or name the state.
"The United States and its allies have no proof and, without even waiting for the Organisation for the Prohibition of Chemical Weapons to take a position, have carried out this military attack... and are responsible for the regional consequences", said foreign ministry spokesman Bahram Ghasemi on his Telegram channel.