Early on Tuesday, Syrian state media said the country's air defences had responded to a missile attack over the western city of Homs.
The Syrian state television report did not, however, specify who may have fired the missiles.
The attack prompted the U.S., Britain and France to launch Saturday's strike on Syria.
It branded the incident an "aggression" but did not name a specific country.
Opposition sources say Dumair airport is a major air base used in a large-scale military campaign waged by the Syrian army with Russian firepower that regained eastern Ghouta, a rebel enclave on the outskirts of Damascus.
Earlier this month, four Iranian military personnel were killed in an airstrike on Syria's T4 air base in Homs.
Both the U.S. and Israel appeared to deny involvement in Monday night's incident.
When asked why the US had not shared the evidence it used to justify the strikes, White said that "a lot of this has to do with intelligence".
Douma was the last rebel-held town near Damascus, and the target of a government offensive in February and March that killed hundreds of people and displaced tens of thousands. The team arrived in Syria on Saturday.
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Heavy rainfall and freezing rain on the way for Windsor region
He says the storm's "impressive rainfall totals" could produce a total of 3 inches of rain and ice melt through late Monday. Drivers were urged to take extra care, as gusty winds and broken tree limbs could add to the danger on icy roads.
Both Russia and the Syrian government have welcomed the OPCW mission. "Russia and Syria must cooperate".
The reports came just a few days after the United States, Britain and France conducted airstrikes targeting alleged chemical weapons facilities in Syria, in retaliation for a suspected poisonous gas attack.
The Russian military said last week its officers in Douma found no evidence to support reports of a gas attack. He said government officials met with the delegation several times to discuss cooperation.
The US envoy to the OPCW, however, expressed concern that Russian Federation had visited the site and "may have tampered with it" to impede the investigation.
The heavily armed and Tehran-backed Shi'ite movement has been a vital military ally of President Bashar al-Assad in the seven-year-old Syrian war. "Therefore allegations of this towards Russian Federation are groundless", Kremlin spokesman Dmitry Peskov said.
"The alleged use of chemical weapons in Syria can not be a justification for military airstrikes in a territory of a sovereign state without the authorisation of the UNSC. They are frantically looking for some justification if their claims that served as the reason for the strike don't receive confirmation".
"A wider operation to hide the facts of the attack is underway, supported by the Russians", she told lawmakers.
Tensions continue in Syria after this weekend's joint airstrikes by the U.S., United Kingdom and France.
The Kremlin says Russian President Vladimir Putin has told German Chancellor Angela Merkel that the United States, Great Britain and France have violated global law and hurt peace process in Syria by launching airstrikes at targets in Damascus.
NATO Secretary General Jens Stoltenberg said the strikes were a "clear message" to Assad, Russia and Iran that chemical weapons use is not acceptable and that the allies would not stand idle.