Ahmad Khan Rahami, 28, is originally from Afghanistan and is a naturalised American living in New Jersey.
"Rahami is wanted for questioning in connection with an explosion that occurred on September 17, 2016, at approximately 8:30 pm in the vicinity of 135 West 23rd Street, New York, New York," investigators said.
He is described as 5 ft 6in tall and weighing 200 pounds. He has brown hair and brown eyes.
CCTV captures moment of explosion in New York
Investigators believe they may be hunting a terrorist cell, just as world leaders arrive in New York for the United Nations General Assembly.
Some 29 people were wounded on Saturday night when an apparently home-made bomb exploded in a dumpster in the Chelsea neighbourhood
In pictures: New York bomb explosion
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The jittery city was put further on edge when a second device - made from a pressure cooker - was found streets away.
"We need to get this guy in right away," he said on CNN. "My experience is one the FBI zeroes in on someone, they will get them."
Authorities are still working to determine whether there is a connection between multiple explosive devices found in Manhattan and at a railway station in Elizabeth, New Jersey.
On Sunday night, FBI agents in Brooklyn stopped what they descibed as "a vehicle of interest" in the investigation of the Manhattan explosion, according to FBI spokeswoman Kelly Langmesser.
Security has been tightened in New York and New Jersey (Getty Images)
She declined to provide further details, but a government official and a law enforcement official who were briefed on the investigation told The Associated Press that five people in the car were being questioned at an FBI building in Manhattan.
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