Officials and analysts say a USA -led punitive strike on Syria is still all but certain.
The attack has drawn worldwide outrage and prompted the United States and its allies to consider a military strike on Syria, something Moscow has strongly warned against.
President Donald Trump says the United States has "launched precision strikes" on targets associated with Syrian chemical weapons program.
The Syrian government has already strongly denied using chemical munitions in the flashpoint town.
"Good souls will not be humiliated", Assad said on his official Twitter account. "We warned about this long ago", he said. She added she didn't want to think about the possibility of Russian or American blood being spilled, arguing that Washington and Moscow could resolve their differences over Syria with better communications. Spokesman Dmitry Peskov said the Kremlin would need some time to study the proposal but noted that no steps would be taken that would harm Russian interests.
Global chemical weapons experts were travelling to Syria to investigate an alleged gas attack by government forces on the town of Douma which killed dozens of people.
The Turkish leader also said he sent video recordings concerning the "painful and disastrous scenes" in eastern Ghouta and Douma to Putin through an envoy of the Russian leader.
Trump was also expected to speak with French President Emmanuel Macron, who said on Thursday France had proof the Syrian government carried out the Douma attack and would decide whether to strike back when all necessary information had been gathered. The White House said it was continuing to assess intelligence and talk to its allies about how to respond.
President Trump has not made a decision yet on how the US will respond to the attack, she said-a point he made clear on Twitter earlier this week.
USA allies have offered strong words of support for Washington but no clear military plans have yet emerged. That would likely happen again, said USA officials. "On the one hand, not hitting Assad harder would be a sign of weakness".
Earlier this day, Trump announced he ordered military strikes on Syria.
But Nebenzia said the goal was to oust President Bashar al-Assad from power.
On the suspected poison gas attack on Douma, Ms Haley said: "We know who did this".
During a U.N. Security Council meeting Friday, U.S. Ambassador to the United Nations Nikki Haley condemned Russian Federation for saying the attack was staged. Asked if the United States had proof of that, she said, "Yes".
In his first days in his job, Bolton has quickly assumed the role of "quarterbacking" the policy part of Syria strategy.
On Thursday, US officials said they had blood and urine samples from victims which had tested positive for chlorine and a nerve agent, according to a NBC News report.
However, Trump later softened his rhetoric, suggesting he was awaiting further advice and assessment before a final decision was made.
"If there is a USA 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", Zasypkin told al Manar.
Nevertheless, some national security aides took Pence's unexpected appearance as an indication that he feels a needs to provide a steadying influence as Bolton takes the helm and White House Chief of Staff John Kelly has been marginalized to some extent.
And then added, as he had in a multi-tweet statement earlier in the week: "Hopefully someday we'll get along with Russian Federation ... but maybe not", he said.