Seven people were taken to hospitals from a day care in Kittery, Maine, on Wednesday, local fire officials said. None of the patients had life-threatening or serious injuries.
The incident at Building Blocks day care on Route 236 was reported as potentially involving carbon monoxide at about 3:19 p.m., Kittery firefighters said.
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The state fire marshal's office was set to investigate what happened, which state officials have confirmed.
About a dozen first responder vehicles were seen at the day care, the NBC affiliate reported.
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