Security was heightened across the city Monday after a man on a motorbike opened fire in front of a Jewish school in France.
The New York City Police Department said there was no specific threat but officers are conducting extra patrols in Jewish neighborhoods and by dozens of synagogues and other institutions to prevent a copycat crime.
Four people died in the shooting in the southwest city of Toulouse.
French officials identified the victims as a 30-year old rabbi and his three- and six-year-old sons, along with a schoolgirl between eight and 10 years old.
"We have no specific threat, no specific intelligence, but certainly I think it's prudent for us, with the population we have here in this city to put in additional safety precautions," Police Commissioner Ray Kelly told reporters.
"I can't speak for the United States, but in New York City you can rest assured, Commissioner Kelly has talked to all of his people, and when we think it appropriate in a ways that sometimes you might not see but is there anyways, we'll certainly look to see that there are no threats here," said Mayor Michael Bloomberg.
The school shooting is also being linked to three others in France over the last week.
Three uniformed soldiers were shot on Thursday; two of whom were killed.
Four days earlier, a soldier was killed in Toulouse.
Officials say each time the gunman rode a motorbike and used the same gun.
By late Monday, it was not known how much longer the heightened security in local Jewish neighborhoods would last.