Washington (CNN) Three unaccompanied migrant children in government custody have tested positive for coronavirus, according to the Office of Refugee Resettlement, marking the first announced positive cases among children in the agency's care.

The children are in the care of one of the agency's facilities in New York.

"ORR's medical team is working with the programs in New York and local health department to collect information and determine next steps," the agency stated. It did not say which countries the children were from or their ages.

The agency, which is charged with the care of unaccompanied children, had earlier stopped placing children in New York amid the increase in coronavirus cases. It will also stop releasing children to sponsors, such as a parent or relative, in the interim as well.

Five staff members and one staff contractor at three separate care provider facilities in New York also recently tested positive for coronavirus, ORR said Thursday, as well as one staff member at a facility in Texas and one foster parent in Washington State.

Read More