Labour MP Kevin Brennan wrote: "Parliamentary approval should have been sought".
Russian foreign minister Sergey Lavrov said Russian experts have inspected the site of the alleged attack in Douma, just east of Damascus, and found no trace of chemical weapons.
In the televised address, Mr Trump said the allies would continue their response until Bashar Al-Assad, the Syrian president, ceased its use of chemical weapons.
"The UK is permitted under worldwide law, on an exceptional basis, to take measures in order to alleviate overwhelming humanitarian suffering", the statement said.
It was not clear whether Labour or other opposition parties would be able to force an emergency debate after May's statement, or whether the speaker in the House of Commons would grant what one party source called a "meaningful vote".
Russia's ambassador to the UK Alexander Yakovenko said The White Helmets, a group of humanitarian volunteers, are supported by the British Government and are "famous for staging fake chemical attacks".
Deploying the armed forces is a prerogative power, meaning the prime minister can launch action without backing from MPs.
May recalled the ministers from their Easter holiday for the meeting at 3.30 pm (1430 GMT) in Downing Street to discuss Britain's response to what she has cast as a barbaric attack that can not go unchallenged.
The U.S. has about 2,000 troops on the ground in Syria as advisers to a makeshift group of anti-Islamic State fighters known as the Syrian Democratic Forces.
"But I believe it should also be a message to others that the worldwide community is not going to stand by and allow chemical weapons to be used with impunity". The strikes at 0100 GMT were 15 miles (24 kilometres) west of Homs.
"The situation in Syria is horrific, the use of chemical weapons is something the world has to prevent", Britain's Brexit Minister David Davis said on Thursday morning.
May said the strike was "limited and targeted" and came after intelligence indicated that Syrian military officials had co-ordinated a chlorine attack in the Damascus suburb of Douma on April 7.
Both Syria and Russian Federation have denied all responsibility for the alleged chemical attacks.
Liberal Democrats leader Sir Vince Cable demanded Parliament be recalled to discuss and vote on the Syria crisis, telling the BBC: 'The position is a very unsafe one because of Russian involvement - also because we have an erratic president of the United States'. The government said its actions met the required tests.
However, there was some support for May.
She now relies on the support of a small Northern Irish party, which has supported the action in Syria, and has tried to dodge votes that might not go her way.
Peter Felstead, editor of Jane's Defence Weekly, said he did not think May would face a "serious backlash", as the strikes ultimately were politically and operationally "the right thing to do".
The UK Cabinet agreed Thursday "that the Assad regime has a track record of the use of chemical weapons and it is highly likely that the regime is responsible for Saturday's attack", according to the Downing Street statement.
The average male driver between 17 and 20 pays on average £2,348 per year, compared to just £1,699 for women of the same age. On a quarterly basis, the 7% fall is recorded as the steepest in four years.
The shares of QUALCOMM Incorporated (NASDAQ: QCOM ) went up during the trading session by $0.53 on Friday , trading at $55.73. Moreover, Parallax Volatility Advisers Limited Partnership has 0.17% invested in QUALCOMM Incorporated (NASDAQ: QCOM ).
The 21-year-old is the first player with 25 points and 10 rebounds in their career playoff debut since LeBron James in 2006 . Needless to say, the rookie did not disappoint after a stellar performance in the loss to the Oklahoma City Thunder .
But that's 26 cents higher than previous year and would be the highest average summer price in the US since 2014. Nationally, the price of unleaded gas as of Monday morning was $2.71 a gallon, according to AAA .
Editor's Note: This is a developing story , we are working to get more information and will bring you updates here on NBC29.com. The Federal Aviation Administration and the National Transportation Safety Board were notified of the crash, police said.
Shifting the focus to some earnings data, we have noted that the current quarter EPS consensus estimate for Delta Air Lines, Inc . In Play Stocks are volatile enough to produce good risk and reward trading opportunities for both bull and bear traders intraday.
Those in need of counseling can contact the University Counseling Center or the Dean of Students Office, 607-777-2804. Several people have been interviewed overnight by investigators from multiple agencies, university officials said.
Among the items: A leather jockstrap from the 2005 movie " Cinderella Man " that Oliver purportedly paid more than $7,000 for. Yes, that really happened - and it was only the start of their late-night spending spree.
Romaine lettuce to blame for E. coli outbreak in 11 states
The farms in the Yuma, Arizona region supplies romaine lettuce to the country during March through November of each year. As of April 12, 2018, 35 people infected with the outbreak strain of E. coli O157:H7 have been reported from 11 states.
RSP Permian (RSPP) Cut to "Hold" at Jefferies Group
Williams Capital Group maintained RSP Permian, Inc . (NYSE: RSPP ), we note that the consensus target price is resting at $51.76. Millennium Management LLC boosted its holdings in RSP Permian by 97.9% in the fourth quarter. (NYSE: RSPP ) for 330,242 shares.
Ousmane Dembele rules out Barcelona departure
A win would take the league leaders 14 points clear of second-place Atletico Madrid, who play on Real Sociedad away on Thursday. A serious hamstring injury within his first few matches has restricted the Frenchman's chances of impressing this season.
Economy Watch: Retail Sales See Healthy Uptick in March
Retail sales were up 0.6 percent for March - more than expected and a figure considered significant by most analysts. Sales at furniture stores climbed 0.7 percent while those at electronics and appliance stores increased 0.5 percent.