In a video report from Damascus, the ultra conservative network claimed to have visited the town surrounding the alleged chemical attack site and concluded they found no evidence of a chemical attack in that area.
Syrian state media says government forces have started bombing an Islamic State-held zone in Damascus.
Earlier on Saturday, the foreign ministry of Russian Federation, a major ally of Syrian President Bashar al-Assad, had also said that the OPCW inspectors had entered Douma.
"At present, we do not know when the FFM team can be deployed to Douma", the OPCW chief said.
Spokeswoman Heather Nauert said the team of inspectors from the Organisation for the Prohibition of Chemical Weapons (OPCW) had not been given access to the site of the alleged attack in the town of Douma on April 7.
These military strikes reinforce the message President Trump sent last April when the United States struck Shayrat Airbase following a regime chemical attack that killed dozens of innocent people.
According to military analysts, the S-300 surface-to-air missile system would improve Russia's ability to control air space in Syria, where Moscow's forces support the government of President Bashar al-Assad, and could be aimed at deterring tougher US action.
The arrival of the vehicle comes three days after a United Nations security team turned back while doing reconnaissance in Douma or the visit of a team of global inspectors from the Organisation for the Prohibition of Chemical Weapons.
Australian dog receives police honours for keeping lost child safe
The little girl, Aurora had wandered away from her family home at Cherry Gully in the south of Warwick on Friday in the afternoon. Max, the heroic dog who stayed by her side, was named an honorary police dog for keeping the girl safe, the report added.
Two administration officials familiar with the matter said Trump changed his mind about imposing additional sanctions and that was not communicated to Haley.
She pointed out that the departure took place only 11 days after the OPCW technical secretariat received the request from Damascus.
The US military, which heads a coalition against the Islamic State group in Iraq and Syria, said Tuesday it had seen the militants "resurge" in some parts of Syria under government control.
Last week's missile attacks on Syria by the United States, Britain and France represented a coordinated response to the ruling regime's alleged use of chemical weapons in Douma.
The United Nations' special envoy for Syria says he is encouraged that Russian Federation continues to support the so-called Geneva process for a political resolution in Syria despite tensions over the Western missile strike.
The Associated Press spoke to survivors, who said they encountered a powerful smell like chlorine.
U.N. Security Council ambassadors are to hold a retreat this weekend in Sweden, where the council's failure to end the seven-year Syrian conflict is expected to be a key issue.
"You can actually do what we call it in the military business as the decontamination process, which is to remove all the evidence on the ground by using other chemicals to neutralise the chemicals on the ground". We watched everything happening in real time.