Russia is warning the U.S. against any \u201cmilitary intervention\u201d in Syria over the government's alleged chemical attack against civilians this weekend, saying any such response would be \u201cunacceptable\u201d and lead to the \u201cmost serious consequences\u201d.\r\nThe foreign ministry in Moscow also says in a statement on its website that allegations of the chemical attack are \u201cfabricated,\u201d suggesting the claims were invented by rebel forces and the Syrian Civil Defense known as the\u00a0White Helmets.\r\n\u201cIt is necessary to warn again that military intervention under invented and fabricated pretexts in Syria, where at the request of the lawful government there are Russian military personnel, is absolutely unacceptable and can lead to the most serious consequences,\u201d the statement reads. \u201cThe aim of these false speculations, that have no basis, is to shield the terrorists and the irreconcilable radical opposition, who reject a political solution, at the same time while trying to justify possible armed strikes from outside.\u201d\r\nThe alleged attack on Saturday killed 40 in the rebel-held town of Douma, multiple opposition and rescue groups including told The Associated Press, which was unable to independently verify the reports.\r\nIt came a year and a day after President\u00a0Donald Trump\u00a0ordered dozens of strikes on a Syrian regime air base for its alleged use of sarin gas on April 4, 2017, that killed approximately 100 people, according to the the State Department. More than 30 of the victims were children. The government of Syrian President Bashar al-Assad denied carrying out the attack.\r\nPresident Donald Trump meanwhile blasted Russian President Vladimir Putin and the government of Iran for backing Assad, whom Trump dubbed "Animal Assad," in the country's years-long civil war.\r\nTrump on Twitter\u00a0called it a \u201cmindless CHEMICAL attack\u201d and blamed "President Putin, Russia and\u00a0Iran" for backing the government of Syrian\u00a0President Bashar al-Assad.\r\nThe State Department, while unable to confirm reports of chemical weapon use Saturday, called the alleged attack "horrifying."\r\n"Reports from a number of contacts and medical personnel on the ground indicate a potentially high number of casualties, including among families hiding in shelters," Nauert said in a release. "These reports, if confirmed, are horrifying and demand an immediate response by the international community."\r\nThe\u00a0United Nations\u00a0also weighed in, saying that the alleged use of chemical weapons if true is "abhorrent."\r\n"The Secretary-General is particularly alarmed by allegations that chemical weapons have been used against civilian populations in Douma," a spokesman for U.N. Secretary-General Antonio Guterres said in a statement. "While the United Nations is not in a position to verify these reports, the Secretary-General notes that any use of chemical weapons, if confirmed, is abhorrent, and requires a thorough investigation."\r\n"It is critical that civilians be protected," the statement from spokesman Stephane Durjarric said. "There has also been shelling on Damascus city, reportedly killing civilians."\r\nThe Syrian government has always denied using chemical weapons against opposition forces or civilians.\r\nBut a U.N. war-crimes investigation found the Assad regime was responsible for the attack last year in Khan Sheikhoun.\r\nThe U.N. Commission of Inquiry on\u00a0Syria\u00a0found in September that Syrian government warplanes dropped a sarin bomb in that attack and that Syrian government forces have carried out more than two dozen chemical attacks in the course of the country's civil war.\r\nHuman Rights Watch\u00a0has estimated the Syrian government has committed \u201cat least five more chemical weapons attacks\u201d since April 2017 when Trump ordered 59 Tomahawk missiles fired on a Syrian airbase. The missiles were fired after the U.S. said a year ago that Assad was responsible for a sarin gas attack on the area of Khan Sheikhoun in northwestern Syria, which killed over 100 people.\r\nRussia\u2019s military, which has supported Assad, denied the Syrian army is behind the chemical attack in Douma in Eastern Ghouta on Sunday and accused Western countries of trying to use the alleged attack for their own ends.\r\n"We decisively deny that information,\u201d the head of Russia\u2019s Reconciliation Center in Syria, Major Gen. Yuri Yevtushenko, told Interfax, referring to allegations that the chemical attack was caused by a chlorine bomb dropped by pro-Assad forces.\r\nYevtushenko said that after Douma has been retaken by the government, Russia is ready to immediately send its own chemical weapons experts in to \u201ccollect data that will confirm the fabricated character\u201d of the allegations.\r\n\u201cWe express our readiness, after the liberation of Douma from militants, to immediately send Russian specialists in radiological, chemical and biological protection for the collection of data, that will confirm the fabricated character of these statements,\u201d Yevtushenko said.\r\nYevtushenko then accused \u201ca range of Western countries\u201d of using the allegations of the attack to try to hinder the Russian-Syrian operation to pull out militants from Douma.\r\n\u201cFor that, that theme beloved by the West, the use of chemical weapons by the armed forces of Syrian Arab Republic, is being used,\u201d Yevtushenko told Interfax. He also said the allegations were being made by groups like the White Helmets, which he accused of \u201cbeing widely known for their\u00a0fake news.\u201d\r\nThe U.S., meanwhile, has supported Kurdish and Arab forces on the other side of the country as they attempt to eradicate\u00a0ISIS\u00a0forces from the country.\r\nIt was less than a week ago that Trump announced during a rally in Ohio that he planned to get U.S. troops out of Syria "very soon." The timing of the comment caught even senior officials off-guard, a senior administration official and a U.S. official familiar with the matter told ABC News. He repeated that he wanted the U.S. military out of the country in a press conference on Tuesday.\r\n"It's time. We were successful against ISIS," Trump said. "We'll be successful against anybody militarily, but sometimes it's time to come back home \u2014 and we're thinking about that very seriously."\r\nThe White House walked back those claims a little on Wednesday, with press secretary Sarah Sanders telling reporters the president isn't going "to put an arbitrary timeline" on withdrawal.