While there is no known specific and credible threat to New York City, Mayor Bill de Blasio said emergency units have been fully deployed by the NYPD following the deadly terror attacks at an airport and subway station in Brussels.

“Every New Yorker should know you’re being protected every day by the finest police force in this country, and a police force that has really developed extraordinary ability to prevent terrorism and keep us safe,” de Blasio said.

The NYPD immediately responded to the attacks in Belgium, not only activating its Critical and Strategic response unit, but also deploying additional counterterrorism teams to major landmarks, transit hubs, as well as other high-profile locations including the Belgian Consulate.

“This is something we think about every day,” Deputy Commissioner of Intelligence and Counterterrorism John Miller told CBS News. “This was an all out effort that is part of the normal drum beat of trying to manage the threat stream in New York City.”