The city's French community is reacting to an attack in the French city of Nice that officials say left at least 84 people dead, including two Americans.

Police officers stood guard outside the French Consulate on the Upper East Side, where 200 people took part in Bastille Day festivities.

NY1 spoke with some French natives there.

"Everybody's very sad, everybody's shocked, but not surprised. It's a little bit deja vu all over again," said one French native. "And I think people getting use to this kind of attack."

"Nowadays, we're not surprised about anything. That's the worst of it, because we expect it at every time, everywhere," said another.

At least 84 people were killed and more than 200 people were hurt in Nice after a truck plowed through a crowd celebrating Bastille Day, according to authorities, swerving to hit as many people as possible.

A couple of dozen of the wounded are on life support. Officials said 50 total people are listed in critical condition.

The State Department said two Americans are among the dead.

Family members say Sean Copeland of Austin, Texas and his son Brodie, 11, were killed in the attack while in Nice on a family vacation.

Authorities said the truck drove more than a mile into a crowd of people watching fireworks along the waterfront.

One witness described bodies being jettisoned like bowling pins. At least ten children are among the dead.

Witness described the truck driver, Mohamed Bouhlel, then exiting the truck and opening fire at people around him.

The truck's driver was killed by police after an exchange of gunfire. Authorities the truck was loaded with arms and grenades.

Bouhlel is a 31-year-old Frenchman of Tunisian descent, and identity papers were found next to his body, according to officials.

He had some prior misdemeanors but no known links to extremist groups, according to officials. He had been living legally in Nice.

Authorities said they took into custody a woman who was divorcing Bouhlel.

The Paris prosecutor's office said it has launched a terror investigation.

President Barack Obama condemned the attack.

In a statement, he said the United States will offer any assistance it can, called the massacre a "threat to all of us," and renewed promises to go after and defeat terrorist organizations.

Mayor Bill de Blasio also spoke about the tragedy at a town hall in Brooklyn.

"There are some Bastille Day celebrations. We're going to have a presence at those. We're going to have a presence, obviously, as we always do, in the well-traveled areas of the city, Times Square and other key locations. So, NYPD is very much on alert right now."

The NYPD says there are no credible threats against the city.

Police Commissioner Bill Bratton said there are no known credible threats to the city but the NYPD is taking every precaution, such as stepping up its presence in areas like Times Square.

The department took similar precautions after the attack on police in Dallas last week.

Gov. Andrew Cuomo also responded by saying, "As the French people came together to celebrate liberty and unity on their independence day, extremists sought to undermine it with hate and intolerance. They will not succeed. New York stands united with France and all our allies in the face of terror."

Cuomo has also directed state law enforcement officials to increase security at high-profile locations across the state, like airports, bridges, tunnels, and mass transit systems.

The presidential candidates are also speaking out, with Hillary Clinton reiterating that the U.S. stands with France and that, "we will not be intimidated."

In an interview on Fox News, Donald Trump said that "this is war" and called the Islamic State militant group a "cancer," although it has not yet claimed responsibility for the attack.

French President Francois Hollande denounced what happened in Nice as a terror attack. The country has also declared three days of national mourning.

In an address to the nation, Hollande said he is extending the country's State of Emergency for another three months.

"Nothing will lead us to give into our will to fight against terrorism, and again we're going to strengthen our actions in Syria and Iraq and to continue to confront those who are attacking us on our very soil," Hollande said.

Hollande visited survivors in a hospital in Nice earlier Friday and warned of a long struggle ahead.

In November, 130 people were killed and hundreds were injured in a series of terror attacks in Paris.

A book of condolences has been opened at the French consulate in Manhattan for people to sign, and a memorial gathering has been scheduled for 2 p.m. Saturday in Washington Square Park.