Germany, for the first time, has taken back children whose parents were IS fighters in Syria.
According to the German media, three of the four repatriated children are orphans.
The country's Foreign Minister Heiko Maas highlighted that the move will push for more such children to return to their home country.
"We will push for more children to leave Syria," he said. "These are mostly young children ... they cannot be made responsible for the actions of their parents and we want to do something to help."
According to reports, about 117 children with German citizenship are thought to be in Syria.

Suspect shot dead after crashing truck into Detroit-area synagogue
Iran's supreme leader, in first remarks, vows to keep strait closed
One person dies after Virginia university shooting
Four Bahrainis arrested for spying for Iranian Guard
Two US sailors injured after non-combat fire aboard carrier in Red Sea
First train to Pyongyang in six years leaves Beijing as neighbours revive link
Six vessels attacked in Gulf, Strait of Hormuz
IEA announces record oil stockpile release over Iran war supply disruptions
