It will be an Election Day unlike any other in New York. Police will be on alert for any potential terrorism threat. Then both presidential candidates will hold their election-night parties here — the first time the candidates have been in the same city on election night in at least 70 years. NY1 Criminal Justice Reporter Dean Meminger reports.

The NYPD says it's locked and loaded for all possible scenarios. Including an election day terrorist attack.

"Over the weekend ISIL came out and called on individuals to attack voters in the United States in an attempt to disrupt the election process here in this country," said NYPD Counter-terrorism Chief James Water. "We are well prepared to deal with any situation like that."

Another threat, by al Qaeda, is also being investigated. However, officials say terror groups always try to use important days in America to inspire attacks.

"We have seen them before holidays; we have seen them before special events," said NYPD Deputy Commissioner John Miller. "This is a part of their M.O. We take all threats seriously."

Some 5,000 officers will be placed on Election Day security —the largest detail ever on Election Day.

One reason both Hillary Clinton and Donald Trump are hosting their election-night celebrations in Manhattan, about 25 blocks apart — Clinton at the Javitz Center and Trump at the New York Hilton.    

The NYPD is coordinating operations with the Secret Service, the agency responsible for protecting the candidates.

"We have a very robust plan in place to secure the two events the secret service will be involved in," said Secret Service Special Agent David Beach. "We are very confident that both events will go off without a hitch."

A wide variety of police assets will be deployed throughout the day including all of the NYPD's bomb-sniffing dogs and many undercover cops.

"Our counter terrorism bureau will be out in full force," said NYPD Chief of Department Carlos Gomez. "You will see  heavy weapons teams from our critical response command. "

The NYPD says although there are a lot of challenges, it says officers are up to the task of protecting everyone.

"New York City will never be intimidated," said Mayor Bill de Blasio. "Never by threats of terror, nor by anyone who wants to do anything to disrupt our electoral process."

And that means a police presence at every one of the polling sites across the city which has close to 4.5 million registered voters.