Turkey has long criticized its European allies for refusing to take back Islamic State fighters who are their citizens.

ISIS leader Abu Bakr al-Baghdadi reportedly died in a U.S. special forces operation Saturday, but some experts are saying his death won't detract much from goal of creating a widespread Islamic caliphate.

“We have not abandoned the Kurds. Let me be clear about that,” Defense Secretary Mark Esper told reporters. "Nobody green-lighted this operation by Turkey — just the opposite. We pushed back very hard at all levels for the Turks not to commence this operation.”

U.S.-backed forces proclaimed the capture of Islamic State's last territory in Syria on Saturday.

U.S. President Donald Trump said on Friday that U.S.-backed forces had dislodged the Islamic State militant group from its last holdout in Syria.

Sweden is calling for an international tribunal to try ISIS fighters for war crimes, such as rape, mass executions and beheadings.

Some of the children are foreigners whose parents brought them to be raised under Islamic State rule, or child fighters conscripted into what the group dubbed "cubs of the caliphate."

Trucks loaded with civilians left the last Islamic State enclave in eastern Syria on Friday, as U.S.-backed forces waited to inflict final defeat on the surrounded jihadists.

“Ms. Hoda Muthana is not a U.S. citizen and will not be admitted into the United States,” U.S. Secretary of State Mike Pompeo said.

Shamima Begum, a teenager who left London when she was aged 15 to join Islamic State in Syria, has had her British citizenship revoked, according to a letter sent to her family published by ITV News.