The cluster of the potentially fatal pneumonia-like illness was initially detected on July 25 and has since been identified across several zip codes in Harlem.

New York City officials said they are investigating a cluster of Legionnaires' disease that has caused one death and nearly two dozen illnesses.

A recent cluster of Legionnaires’ disease has led to one person’s death. Officials said 30 people have been sickened, up from 22 earlier in the week, according to the New York City Health Department