ISIS released at least 19 Christians on Sunday who were among the more than 220 people the militants 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 Islamic State 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.