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

A fourth person has died amid the Legionnaires’ disease outbreak in central Harlem, according to the New York City Department of Health. The outbreak that began in late July has since spread to 99 confirmed cases as of Thursday, with four deaths and 17 hospitalizations. Those who have died have not been identified.

A fourth person has died in New York City’s Central Harlem Legionnaires’ outbreak, traced to contaminated cooling towers, with dozens sickened and health officials urging immediate medical attention for symptoms.