A Legionnaires’ disease outbreak in New York City has left 70 people sick and three dead. Officials suspect cooling towers to be the source of the Legionella bacteria.

A cluster of Legionnaires’ disease in New York City has grown to include 67 cases and three deaths, the city health department announced in an update that continued to focus on cooling towers as the likely source of the infections.

A Legionnaires' disease outbreak in Harlem is blamed for at least three deaths, and NYC officials are warning to watch out for the symptoms.