He said Russian specialists and aid workers had visited the area. The Union of Medical Relief Organisations, a US-based charity that works with Syrian hospitals, told the BBC that the Damascus Rural Specialty Hospital had confirmed 70 deaths. The group blamed the Syrian regime.
Reports suggested more than 500 people, mostly women and children, were brought to medical centres with difficulty breathing, foaming at the mouth, and burning sensations in the eyes.
This situation, the news outlet stated, was the key drive behind the Jaysh al-Islam media wing to charge the Syrian forces with the use of chemical weapons in an effort to force-stop the operation by arousing worldwide solidarity.
He also alleged a "provocation" had been prepared to blame the regime for an attack.
SANA reported that the missile attack on the T4 military air base in Homs province resulted in a number of casualties. The Pentagon denied in a statement that the US military had launched the missile strikes and would continue to "closely watch the situation".
In an appearance on ABC's "This Week", Bossert said United States officials have examined photos and information about the incident in Douma, a Damascus suburb. Slamming Syrian president Bashar al-Assad calling him an animal and calling out Russian president by name.
A chemical attack in a Syrian rebel-held town has sparked widespread worldwide outrage and revulsion.
There is an worldwide law which bans countries from using chemical weapons in wars, as they are deemed too cruel to use on other people.
Countries backing Assad's government should be held to accountable along with the Syrian leader, British Prime Minister Theresa May said on April 9. He said that this recent chemical attack proves the "need" for a USA attack and Washington's interference against the rising troops in Syria.
Russia, with its unwavering support for the regime, ultimately bears responsibility for these brutal attacks, targeting of countless civilians, and the suffocation of Syria's most vulnerable communities with chemical weapons.
It came nearly exactly a year after a suspected gas attack killed at least 74 people in Khan Sheikhoun, Idlib province, prompting the USA to launch cruise missiles at a Syrian airbase.
Since February 18, the Syrian government's Ghouta offensive has killed more than 1,600 civilians. A United Nations investigation confirms the use of sarin gas delivered by rockets.
The furious United States president called his Syrian counterpart (also pictured) an "animal" as footage emerged of babies and children foaming at the mouth.
Major General Yuri Yevtushenko, head of the Russian military's Reconciliation Center in Syria, confirmed on Sunday that a convoy of 100 buses had entered Douma to begin the evacuation.
French President Emmanuel Macron has also threatened to strike Syria if the government uses chemical weapons against ordinary people.
Helicopter-dropped chlorine-filled munitions have been increasingly used by the regime as the conflict has dragged on, according to a 2017 report by Human Rights Watch. To the moment, there are no reliable reports explaining how the attack took place and how many people have died.
Although the SANA news agency said it was likely "an American aggression", USA officials said the United States had not launched the strikes.