Health officials in New York City say an outbreak of Legionnaires’ disease in Central Harlem has grown to 90 cases, including three deaths.

Three people have been killed this week by an outbreak of Legionnaires' disease in central Harlem, Manhattan, according to the New York City Health Department. At least 64 other people have been diagnosed since July 25. The rapidly expanding cluster has prompted urgent public health interventions with residents and workers in five Harlem ZIP codes.

City officials identified 12 cooling towers in 10 Harlem buildings that tested positive for Legionnaires' disease, including Harlem Hospital Center.