According to Save the Children, an estimated 200 foreign children were repatriated in 2020 from camps in north-east Syria, down from 685 in 2019.
A U.S. official told the Associated Press that the strikes were carried out with American intelligence cooperation.
In this vast plain of the Al Harrah desert, stretching from Syria across north-eastern Jordan and into Saudi Arabia, ancient drawings are carved into volcanic basalt rock.
Syria is holding parliamentary elections across government-controlled areas of the country, as President Bashar al-Assad marks 20 years in power amid continuing war and deep economic woes.
Opposition from Russia forced the UN Security Council to limit humanitarian deliveries to Syria's mostly rebel-held northwest from only one crossing point.
An international security expert believes Turkish President Erdogan may have overplayed his hand in the ongoing conflict in Syria.
Smoke was seen in the skies near Idlib, Syria on Tuesday air strikes on the towns of Al-Bara, to the south of the city, and Balyun.
"Idlib is about to be the most catastrophic humanitarian situation in history," a Syrian White Helmets volunteer told Euronews.
A wave of displacement that has seen around 700,000 people flee a regime offensive in Syria's Idlib region is the biggest of the nine-year-old conflict, the United Nations said on Tuesday.
Turkey's foreign minister says Ankara and Moscow are working to keep peace efforts for Syria alive despite a deadly clash between Turkish and Syrian forces