UPDATE: most likely unhappy dis-satisfied homegrown USA punks.
"I think the intent was to cause a significant ball of fire," he said. "And scare the bejesus out of all New Yorkers. It was a psychological strike, foremost."
Firefighters who arrived shortly after first call heard a popping sound, said NYC Fire Commissioner Sal Cassano, who described the sound as not quite an explosion.
The bomb appeared to be starting to detonate but malfunctioned, top police spokesman Paul Browne told The New York Times and Wall Street Journal.
No suspects were in custody, although Kelly said a surveillance video showed the car driving west on 45th Street before it parked between Seventh and Eighth Avenues. Police were looking for more video from office buildings that weren't open at the time.
KEY: WHO WAS THIS GUY?
A Connecticut license plate on the vehicle did not match up, he said. Police interviewed the Connecticut car owner, who told police he had sent the plates to a nearby junkyard, he said.