Gov. Cuomo on Sunday called the Chelsea explosion “an act of terrorism” but said there was “no evidence” of ties to an international group.

Cuomo urged calm on the morning after the blast and said federal authorities were investigating the explosion that injured 29 people.

“We have no reason to believe at this time that there is any further immediate threat,” Cuomo said.

“But just to err on the side of caution, we will be deploying close to 1,000 state police and National Guard people to police the bus terminals, airports, and subway stations”

Cuomo added that “a bomb exploding in New York is obviously an act of terrorism” and vowed to find those responsible.

“The bottom line on this is, whoever placed these bombs, we will find them, and they will be brought to justice,” he said.

“You have the finest police agencies in the world when you come to New York.”

Cuomo said the devices in Manhattan were different from the one that exploded near a Marine Corp race in Seaside, NJ, earlier Saturday.

“FBI collected evidence from site of explosion as well as from bomb that didn’t detonate to Quantico, [Va.], to study them,” he said.

With the New Jersey explosion, there were no injuries, and the device was reported to be a pipe bomb.

The second device found in Manhattan appeared to be a pressure-cooker device. It did not detonate.

Law-enforcement officials have not yet clarified what exploded inside the dumpster on 23rd Street on Saturday night.

Cuomo added that all 29 victims had been treated and released from the hospital.

“We really were very lucky that there were no fatalities at the time,” he added.