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

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 Maine Fire Marshal's Office is investigating a carbon monoxide incident that happened at Building Blocks Learning Center off Route 236 in Kittery on Wednesday.

A man and two officers were hospitalized due to suspected carbon monoxide poisoning in Bourne, Massachusetts, prompting safety reminders about the dangers of inadequate ventilation and the need for detectors.