A military official, who provided information about the attack on the condition of anonymity because he was not authorized to discuss it on the record, said the attacking forces initiated the assault by lobbing artillery at the SDF and US forces, who were located eight miles east of the Euphrates River.
One Syrian rebel soldier was wounded but no US forces were killed or wounded, according to NPR's Tom Bowman, who is reporting from elsewhere in Syria.
Assad regime forces hit the headquarters of the Syrian Democratic Forces.
No U.S. casualties were reported after the confrontation.
One US official said the pro-government forces may have been trying to seize the Khusham oil fields.
The Syrian army, which is supported by Iranian-backed militias and Russian forces, are active on the other side of the river by the city of Deir al-Zor.
Neither U.S. officials nor the U.S. -backed coalition have offered details on the identity of attacking forces.
USA coalition forces have issued a statement on Wednesday confirming a series of United States airstrikes against Syrian pro-government forces along the Euphrates River. Up to 30 artillery and tank rounds came within 500 yards of an SDF headquarters.
More Snow in Store for This Week, Winter Storm Watch Issued
A Winter Weather Advisory is scheduled to go into effect at six Tuesday night and remain in effect until six Wednesday morning. Snow will start later in the day Tuesday and continue through the night when 5- to 8 inches of wet, heavy snow is possible.
After the attack the coalition "conducted strikes against attacking forces to repel the act of aggression".
No U.S. special operations troops were hurt in the attack, officials told Fox News. Officials declined to say whether the airstrikes were conducted with manned or unmanned aircraft.
Skirmishes between the SDF and Syrian Regime Forces are not uncommon given the recent major defeats of ISIS, with the retaking of its former capital Raqqa last October, resulting in both armed group's advances connecting.
Influenza affecting more people than normal: Northern Health
In mid-January, about 10 percent of Wichita drivers - four times the usual number - called in sick each day, Jen Biddinger said . With those numbers expected to increase health officials in north Georgia are stepping up flu prevention efforts.
This mix of features gave the spiders their name: a reference to a mythical creature with a lion's head and serpent-like tail. It belongs to a group of arachnids (spiders, scorpions and the like) that were related to true spiders.
He has passed the 100 Premier League goal mark while with the Potters and committed to a new contract in November 2017 . He has dismissed that notion. "Now we have to struggle to fight for a Champions League place - that is top", he said.
The study found an increased risk of cardiac schwannoma, a tumor type that typically originates from cells found in neurons. EWG has been at the forefront of public interest organizations raising concerns about cellphone use and cancer.
The Chief Minister welcomed the Prime minister to Bengaluru , and asked him help the State resolve the Mahadayi water dispute. Several Hindu activists were murdered in the state which was a threat to democracy, the Prime Minister said.
The Lions went 9-7 last season and missed the playoffs , ranking among the NFL's worst rushing teams for the fourth straight year. Detroit's search was focused on Patricia right from the start because he worked with Quinn for a dozen years in New England.
The law would make it illegal to accuse the nation of complicity in crimes committed by Nazi Germany, including the Holocaust . Analysts say that the legislation has isolated Poland from Israel, a key ally of the United States and neighbouring Ukraine.
Traders and financial professionals work on the floor of the New York Stock Exchange ahead of the opening bell, February 2. The Dow Jones Industrial sank 2.5 per cent, 665 points, to 25,520.96, its worst drop in percentage terms since June 2016.
Anthony Cassar got the start at 197 pounds against No. 1 Kollin Moore and sent Rec Hall into pandemonium with a 6-3 upset. Team leader Kelsey Mitchell will serve as the biggest threat to UW, as she can rack up points from anywhere.
The musical lineup for the Adidas #747WarehouseSt NBA All-Star event has been announced and it's looking pretty good. It will begin with the skills challenge, move on to the three-point contest, and conclude with the dunk contest.
In the meantime, Wells Fargo is permitted to continue accepting customer deposits and make consumer loans, the Fed said. Powell, a Fed board member since 2012, is "thoughtful, balanced, dedicated to public service", Yellen said.
Storm brings freezing rain and snow to US Northeast
Some airlines preemptively canceled or delayed flights on Tuesday in preparation the conditions Winter Storm Liam would bring. The National Weather Service is issuing a Winter Storm Watch starting Thursday evening and lasting into Friday evening.
Cancer cocktail: hot tea plus twin sins
Based on the findings, the researchers offered some advice for people who smoke or drink large amounts of alcohol. The researchers' conclusion that people who smoke and drink excessively might want to cut out hot tea seems odd.
Judge maintains Assange UK arrest warrant
Senior district judge Emma Arbuthnot is due to give her ruling on Tuesday, although either side can appeal against the decision. Julian Assange has claimed a package containing a "threat" and white substance was sent to him at the Ecuadorian Embassy.
Rajasthan Bypolls Results: Cong Wins 2 Seats, Leads on 1
The BJP candidate came second with 38,711 votes, while the CPI (M) candidate was slightly behind at third spot with 35,497 votes. In Alwar, after 82 per cent of the vote count done with, Karan Singh Yadav of the Congress was leading by 144,914 votes.
Ecclestone laments 'prudish' end of Formula One grid girls
She said: "You dress glamorously and obviously it's about being presentable but I never felt I was taken advantage of". Bernie Ecclestone, meanwhile, has slammed the "prudish" decision to dispense with grid girls in the lead-up to races.