BEIRUT: The Daesh militants released at least 19 Christians on Sunday who were among the more than 220 people they took captive in northeastern Syria last week, activists and a local leader said.

The news provided a modicum of relief to a Christian Assyrian community that has been devastated by the abductions, which saw Daesh fighters haul off entire families from a string of villages along the Khabur River in Hassakeh province. But fears remain over the fate of the hundreds still held captive.

Bashir Saedi, a senior official in the Assyrian Democratic Organization, said the 16 men and three women arrived safely Sunday at the Church of the Virgin Mary in the city of Hassakeh. He said the 19 - all of them from the village of Tal Ghoran - had traveled by bus from the Islamic State-held town of Shaddadeh south of Hassakeh.

The Assyrian Human Rights Network also reported the release, and published photographs on its Facebook page that it said were from Hassakeh showing a crowd dressed in winter coats greeting the returnees.

The photos appeared genuine and corresponded to Associated Press reporting.

It was not immediately clear why Daesh group freed these captives.

Saedi said all those released were around 50 years of age or older, which suggests age might have been a factor. The Assyrian Human Rights Network, meanwhile, said the captives had been ordered released by a Shariah court after paying an unspecified amount of money levied as a tax on non-Muslims.

The Britain-based Syrian Observatory for Human Rights also said a Shariah court had ruled the captives be freed, but the reasoning behind the decision was unknown.