The NYPD will ramp up security on Tuesday in response to the Brussels bombing attacks.

Police indicated they will have a larger presence on trains, around key infrastructure and near landmarks on Tuesday, NBC4 reported.

"We are aware of the situation and we are continuing to monitor for further developments," an NYPD statement was quoted by ABC7.

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New York’s three major airports will see additional security from the Port Authority Police Department, which will also be conducting anti-terrorist patrols in the PATH system and around the World Trade Center site, NBC4 added.

The police said in a statement that there is no currently known indication that the Belgium attack is related to New York City, but authorities will continue to collaborate closely with the Joint Terrorism Task Force and the FBI.

New York Gov. Cuomo listed ways that the state took action on Tuesday morning in light of the attacks, including increasing National Guard presence at JFK and LaGuardia airports, assigning a greater number of New York State Police troopers to Penn Station, Grand Central, the Midtown tunnel and the George Washington Bridge, and increasing police presence at rail stations in the city, Westchester County and Long Island, according to a statement from the governor’s office.

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"Public safety is paramount, and I want the people of this state to know that we are working with all local and federal partners, remaining vigilant and taking all necessary measures to keep New Yorkers safe," Cuomo was quoted in the statement.

Gov. Cuomo has directed that One World Trade Center's spire be displayed in black, yellow and red on Tuesday night to show solidarity with the people of Belgium. 

"We stand in solemn solidarity with the people of Belgium, just as they have done for us in the past. We join the world in mourning the victims of these attacks and remain committed to helping create a more just and peaceful world," Cuomo stated.