A restaurant manager died and one of his employees remained hospitalized after inhaling carbon monoxide at a Long Island mall, authorities said Sunday.

Another 26 people were treated and released after the incident, according to hospitals.

Police and emergency crews rushed to Walt Whitman Shops in Huntington Station, New York, on Saturday night after reports that a woman had collapsed in the basement of Legal Sea Foods. Once they arrived, they felt dizzy as well and determined that the cause was carbon monoxide poisoning, said police in Suffolk County, New York.

A sign on the restaurant's door Sunday said the building has been condemned as being unsafe and unfit for human habitation.

Investigators found a leak in the flue pipe of the water heater, said A.J. Carter, a spokesman for the town of Huntington.

Authorities sent the restaurant a summons for faulty equipment, which carries a fine of up to $2,000, Carter said.

(Source: CNN)