The three allies took military action in response to an alleged chemical attack in the rebel-held town of Douma a week ago that killed at least 40 people.
After last weekend's attack, some US officials advocated a larger strike than the limited action Trump ordered in April 2017, also in response to suspected chemical-weapons use. A senior administration official told reporters Saturday that while there was more publicly available evidence pointing to the use of chlorine, the USA has "significant information that also points to sarin use".
Assad has denied any involvement but Vice President Mike Pence put him and the leaders of Iran and Russian Federation on notice.
Nikki Haley added that the United States ties with Russian Federation are "very strained", in part because of Syria, but the U.S. still hopes for the better relationship.
Haley also said the USA would not have any one-on-one talks with Syria's Bashar Assad.
Another administration official laid out evidence on Saturday for the United States' conclusion that Syrian President Bashar al-Assad's government was behind the chemical weapons attack; that included eyewitness accounts of Syrian government helicopters circling the site of the attack on April 7 and high-resolution photos that "clearly" documented asphyxiation and foaming at the mouth. She says: "President Assad has an absolutely positive attitude, a good mood".
But the only norm we're really enforcing is the one that says the United States is exempt from the laws and norms by which our adversaries must abide. A sarin attack in 2013 was also what almost brought then-President Barack Obama to strike Syria.
Only China and Bolivia voted in favour, while three other countries abstained.
One official cautioned, however, that United States intelligence assessments indicate Assad still has chemical weapons in Syria.
Just before dawn on Saturday, the sounds of massive explosions and the roar of warplanes rang out across Damascus for about 45 minutes.
In the wake of Friday's strikes, Congress should engage in a vigorous examination of Trump's overall Syrian policy.
"Could not have had a better result".
It said three civilians were wounded in the Homs attacks but did not give a toll for Damascus or mention any combatant casualties.
In a statement on Saturday, the IRGC said the trilateral military strike on Syrian government targets will strengthen the willpower of the anti-terror resistance elements and deepen the Syrian nation's hatred of the Western-Arab criminals. The official spoke anonymously according to protocol. The vessels were located in the Red Sea, the Gulf and the eastern Mediterranean.
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Wow!" exclaimed manager Jurgen Klopp on hearing Salah is the first Liverpool player since Ian Rush 31 years ago to score 40 in a season.
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He also conceded it was sweet to triumph in a country where some critics claimed his purist principles couldn't flourish. He won three league titles with Barcelona and twice lifted the Champions League trophy during his Camp Nou reign.
Were the joint strikes legal? 1.
"Despite the tools available to the global community, it is hard to agree on a common action toward peace in Syria or other regions of the world", the pope told a crowd of 30,000 after his traditional Sunday blessing.
Vice President Mike Pence attends the Eighth Americas Summit in Lima, on April 14, 2018.
In total, the USA and its allies fired more than 100 missiles, but the Pentagon could not confirm how many hit their targets.
U.S. President Donald Trump praised the military strike on Syria as a "perfectly executed" operation and said it was aimed at ending the use of such weapons of mass destruction.
Mr Assad responded to the strikes with a defiant vow.
"This aggression will only make Syria and its people more determined to keep fighting and crushing terrorism in every inch of the country", Assad, in his first reaction to the strikes, told his Iranian counterpart Hassan Rouhani.
Syrian state media accused Western powers of trying to hinder the investigation with their attack.
The targets appeared to steer well clear of any Russian personnel or equipment in Syria, where Moscow launched a military intervention in support of Assad in 2015.
Trump tweeted Mission Accomplished on Saturday after US, French and British warplanes and ships launched more than 100 missiles almost unopposed by Syrian air defenses.
On Saturday, a team of United Nations chemical experts arrived in Syria to investigate whether Assad's government was responsible for the attack a week ago.
Russian Federation has declared victory three times in Syria and thwarted worldwide efforts for a political transition and Assad's eventual departure, said Maksad.
And it would establish a new body to determine responsibility for chemical attacks, call for a cease-fire in Syria, unimpeded access for all humanitarian aid, and an urgent resumption of negotiations on a political settlement.
Ahmad, a 25-year-old mechanic who had been displaced from Douma, told AFP the Western strikes were nevertheless too little, too late.
"Everyone is going to feel it at this point", Ms Haley said, warning of consequences for Mr Assad's foreign allies.