Seven children were rushed to the hospital after a carbon monoxide emergency inside a Kittery, Maine day care.

KITTERY, Maine (WGME) -- Investigators say they have determined the source of the carbon monoxide leak at a Kittery day care center that resulted in multiple children and adults being rushed to the hospital.

The town said there were 27 children and approximately 10 staff in the day care building. It is unclear if children were hospitalized.