NEW YORK (CBSNewYork) — With recent terror attacks overseas, the NYPD is pulling out all of the stops to keep the Fourth of July fireworks on the East River safe from terrorism.

Ordered by the Department of Homeland Security to be especially vigilant and prepared, the NYPD is stepping up its game for the Macy’s fireworks display.

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“This may be potentially the most complex counterterrorism overlay for this event ever,” NYPD Deputy Commissioner of Counterterrorism John Miller told reporters, including WCBS 880’s Marla Diamond, on Wednesday.

The security measures include radiation detection, checks on suspicious vehicles, hotel staffs and suspicious guests, and social media monitoring.

The three terror attacks in Kuwait, France and Tunisia last week, a wave of attacks in Egypt on Wednesday and the demand by ISIS for attacks against the enemy during Ramadan, which ends July 17, has prompted the extra caution.

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Miller said there are no known credible threats to the city or event. But there is concern about a possible lone wolf seeking to make a statement.

He said police are preparing for a broad spectrum of threats.

“The ISIS call, as well as that of other terrorist groups, has been to use what you have on hand, and that means that if you can make a bomb, you’re a bomber; but if you can’t, use a gun; and if you can’t find a gun, use a knife; and if you can’t find a knife, use a car,” Miller said.

Miller said police will be extra vigilant, but urges spectators to be aware as well. Anyone who sees anything suspicious is asked to call 877-NYC-SAFE.

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“Come to the fireworks,” Miller said. “Bring your families. Have a great time, because you’re going to have one of the most well-policed, best protected events in what is one of the safest venues in the world.”