NORTH TONAWANDA, N.Y. — North Tonawanda City Schools are closed on Monday.

Families received a robocall and emails from administrators saying it's because of the increasing number of COVID-19 cases in the area.

Officials had an important reminder for parents with children who are showing symptoms. The district says you cannot use a negative at-home COVID-19 test to prove they can return to school.

North Tonawanda schools say they're working to develop a procedure for Test-to-Stay and new guidelines are on the way.