The UK Telegraph seems to have the most detail:
US air strike killed more than 85 civilians, including children, in Syria on Tuesday after the coalition mistook them for Islamic State fighters.
Some eight families were hit as they tried to flee fighting in their area, in one of the single deadliest strikes on civilians by the alliance since the start of its operations in the war-torn country.
Pictures of the aftermath of the dawn strikes on the Isil-controlled village of Tokhar near Manbij in northern Syria showed the bodies of children as young as three under piles of rubble.
The UK-based Syrian Observatory for Human Rights said the strikes appeared to have been carried out in error, with the civilians mistaken for Islamist militants.
It is likely the airstrikes were among the first from Incirlik airbase after the attempted coup in Turkey.
Other news organizations are running stories, including the Washington Post:
The U.S. military said it is investigating claims that American airstrikes were responsible for the deaths of as many as 160 civilians early Tuesday in Tokhar, 10 miles from the northern town of Manbij. [...]
The alleged strikes coincided with intense fighting in the Manbij area as a U.S.-backed coalition of Kurdish and Arab fighters called the Syrian Democratic Forces presses ahead with a seven-week-old offensive to capture Manbij. Earlier Tuesday, the U.S. military announced that the SDF had secured control of the Islamic State headquarters in the town. A separate statement said American warplanes had conducted 18 strikes in the previous 24 hours around Manbij.
The NY Times is carrying Reuters’ report:
At least 56 civilians were reported killed on Tuesday in airstrikes north of the besieged Islamic State-held city of Manbij in northern Syria, and residents said they believed the attack was carried out by aircraft from the United States-led coalition, a monitoring group said.
The Britain-based Syrian Observatory for Human Rights said that the dead included 11 children, and that dozens more people were wounded.
At CNN: