The Legionnaires' disease outbreak in Central Harlem has been traced to 12 cooling towers, including several at city-run buildings like Harlem Hospital, officials said Thursday.

A fourth person has died in connection with a Legionnaires’ disease outbreak in New York City. Health officials disclosed the latest death Thursday as they revealed that some cooling towers tested positive for the bacteria in some city-run buildings.

A cooling tower at Harlem Hospital was among 12 sites tied to the city’s Legionnaires’ disease outbreak that’s now killed four people and sickened nearly 100, Department of Health officials