Russia's foreign minister has submitted documentation based on "concrete facts" to the United Nations and the Organization for the Prohibition of Chemical Weapons warning of a potential false-flag chemical weapons operation coming in Syria's Idlib province.
On Sunday, government forces bombed the village of Hobeit in Idlib province, killing an infant girl and wounding several other civilians, the Syrian Civil Defence search-and-rescue group reported.
"This would unleash a humanitarian nightmare unlike any seen in the blood-soaked Syrian conflict".
Idlib is the last refuge for the Syrian opposition and home to close to 3 million people, including 1.4 million displaced Syrians hailing from provinces now controlled by the government and close to 1 million children.
Residents were said to be preparing themselves ahead of expected offensives on Syria's last rebel stronghold.
Although Erdogan has been a staunch supporter to the regime's opposition forces in an effort to oust Syrian President Bashar al-Assad, he has also been involved in talks with Iran and Russian Federation to find a political solution to the conflict in Syria which is entering its eighth year.
Guterres made the appeal after the Security Council remained divided over Idlib on Tuesday.
In an article in today's Wall Street Journal, he calls on the worldwide community to take action, and warns that "the entire world stands to pay the price" otherwise.
Turkey has renewed calls for global backing for a ceasefire in Idlib, telling the United Nations security council that an all-out assault on Syria's rebel-held province would trigger a huge wave of refugees and could threaten Europe.
Turkey, Russia and Iran past year set up the Astana process, a negotiating track to end Syria's war that complements the UN-led peace process.
Rebel-held Idlib province and adjacent rural areas, worn down by a succession of government victories in recent months.
"The United States is long past taking Russian Federation and Iran at their word that they are genuinely interested in protecting civilians in Idlib from further violence", Haley said.
Washington claims that the Syrian government forces may carry out a chemical weapons attack in Idlib and warned that such actions will have serious consequences.
The province and its surrounding areas are the last major enclave held by rebels opposed to Syrian President Bashar al-Assad.
USA ambassador Nikki Haley accused the regime's main backers of escalating the violence in Idlib province and using terrorist tactics.
"It has failed to stop the violence or to promote a political solution", U.S. Ambassador to the U.N. Nikki Haley said. "The world will hold them responsible", she added. "That's something we're monitoring very closely", OCHA spokesman David Swanson told AFP. Between 700 and 1,200 of those killed by Russian Federation died during the brutal campaign to reclaim eastern Ghouta earlier this year, according to the non-profit Air Wars, a campaign that also saw the Syrian regime use chemical weapons in the town of Douma.
Roughly half of the displaced are staying in camps, Dujarric said.