Building Blocks Learning Center plans to close permanently after at least 11 people were hospitalized in the gas leak.

"If a State Fire Marshall cannot tell the difference between these detectors, how can I be expected to?" the daycare owner told families.

Boonsboro Volunteer Fire & Rescue reports responding to a home with a carbon monoxide leak resulting in injuries on February 19. Boonsboro Fire officials said around 9:23 p.m. on Wednesday, crews responded to a home at the 3000 block of Trent’s Ferry Road after reports of a person with carbon monoxide

Several students and staff members needed medical treatment after being exposed to carbon monoxide inside the building.

A Kittery child care center where nearly a dozen people were treated for carbon monoxide poisoning last week did not have a working carbon monoxide detector.

While a cause has been determined behind what caused a carbon monoxide leak at a New England day care on Wednesday, it continues to be under investigation.

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