New Delhi, Feb. 3 -- An international humanitarian organization has warned that supplies are running out at a camp in northeast Syria housing thousands of people linked to the Islamic State group, as the government struggles to establish control over an area formerly controlled by Kurdish fighters.

The late Friday statement from Save the Children came a week after government forces captured al-Hol camp, which is home to more than 24,000 people, mostly children and women, including many wives or widows of IS members.

The capture of the camp came after intense fighting earlier this month between government forces and members of the Kurdish-led and U.S.-backed Syrian Democratic Forces, during which forces loyal to interim President Ahmad a...