Later in the evening, he held a meeting on Syria with his top military and national security officials.
Nebenzia rejected a U.S. call for the world body to set up a probe to identify the perpetrators of what rescuers called a "poisonous chlorine gas attack" late Saturday in the enclave of Douma, near Damascus.
Mr. Trump yesterday promised a rapid decision on action, as "we can not allow atrocities like that". He said: "We have a lot of options militarily, and we'll be letting you know pretty soon".
White House press secretary Sarah Sanders said Monday that the President still wants to pull U.S. troops from Syria once ISIS is defeated there and rejected the notion that his comments about a future withdrawal may have emboldened the Syrian President Bashar al-Assad.
Separately, on Monday, with tensions high over the alleged chemical attack, Syria and Russian Federation accused Israel of deadly missile strikes on a Syrian regime air base.
Trump's comments slightly softened his earlier tweets on April 8 where he directly blamed Russia, Syria and Iran for the alleged chemical attack. More than 1,000 Iranians have been killed in Syria, including senior members of the Guards.
"To that extent, I agree with the US State Department and the US administration that says Russian Federation ultimately bears responsibility for the targeting of countless Syrians with chemical weapons".
First, on Saturday, government forces carried out another chemical weapons attack at Douma, east of Damascus, killing dozens of people, including children.
On the other hand, first-hand reports from the area clearly indicate that an attack has indeed taken place-aid workers in the area have said that the hundreds affected show symptoms consistent with a chemical attack. Yevgeny Serberennikov, from the defense committee at the Federation Council, told the RIA Novosti news agency that Russia is eager for the OPCW to "finally start carrying out the functions it was created for".
The Revolutionary Guards, Iran's most powerful military force have been fighting in support of Syrian president Bashar al-Assad for several years. An escalation to full-tilt US military involvement in Syria would quickly evolve into costly conflict, including possibly with Russian Federation and North Atlantic Treaty Organisation ally Turkey.
"If it's Russian Federation, if it's Syria, if it's Iran, if it's all them together, we'll figure it out and we'll know the answers quite soon", Trump said. Kremlin spokesman Dmitry Peskov said Tuesday the United States has taken an unconstructive position and is refusing to face reality.
Syria's government has denied using chemical weapons throughout the Syrian conflict, which began in 2011.
The Syrian regime and their key ally, Russia, have both denied involvement.
"The US resolution is pretty obviously a bait for the Russians, who will have no choice but to veto it", said Richard Gowan, a United Nations expert from the European Council on Foreign Relations.
The US State Department said Mr Johnson and his Washington counterpart had discussed "potential further steps the US and United Kingdom governments might take in coordination with other partners".
"We need to work with the United Nations and hold President Assad accountable for his war crimes", Cardin said. "Signaling we want to remove our troops in no way degrades our ability to hold parties responsible", she said in response to a question.
Amid the tough talk at the White House, the USA military appeared to be in position to carry out any attack order.
Fire in Trump Tower in NY kills 1
Police identified the man killed as Todd Brassner , 67, a resident of the building's 50th floor. President Trump was not in New York City this weekend. " Fire at Trump Tower is out".
Israeli defence minister says 'no innocent people' in Gaza
Britain should also consider stopping the sale of arms to Israel that "could be used in violation of worldwide law", Corbyn said. Israel's use of live ammunition has drawn condemnation from human rights groups, which say it is illegal under worldwide law.
Pakistani prime minister in Afghanistan to ease tensions
During his meeting with Ghani, the Afghan president invited PM Abbasi to "initiate a state-to-state comprehensive dialogue". The statement said Ghani and Abbasi held a one on one meeting followed by delegation level talks at the Presidential Palace.
China matches US's $50 billion tariff threat
FILE PHOTO: The Boeing building is seen next to Boeing Field in Seattle, Washington, U.S., March 26, 2018. Stocked plummeted early Wednesday after trade tensions escalated between China and the United States .
Welbeck double in fiery clash deepens Southampton's gloom
DANNY Welbeck scored two goals and got an assist as Arsenal overcame Southampton at the Emirates Stadium this afternoon (Sunday). Aubameyang found the back of the net once again for the Gunners in their win over Southampton earlier today.