Syrian Archbishop Pleads for Help Against ISIS He fears the worst for those kidnapped by the terror group.

 -- Assyrian Christians in Iraq and Syria have made up some of the oldest Christian communities in the world since biblical times.

But after ISIS militants ransacked their villages in northeastern Syria earlier this month and took hundreds of hostages, many religious leaders in the region fear these ancient communities may not survive.

Last week, ISIS released a handful of elderly hostages, but the fates of many more remain uncertain. Some reports say ISIS may still be holding as many as 250 people captive.

Watch the ABC News digital original video above to hear directly from war-torn Syria as one archbishop begs the international community to help.