NEW YORK — A car bomb left in Times Square, made of easily purchased items, including alarm clocks and gasoline, could have sent a "significant fireball" hurtling through one of the world's busiest tourist spots, police said Sunday as they searched for a man caught on film who might be linked to the failed attempt.
The attack, coming months after a foiled plot by Afghan immigrants to blow up New York subways, underscored the vulnerability of heavily policed Times Square, which since the Sept. 11, 2001, attacks has been under close watch by police and scores of surveillance cameras.
"We're very lucky. We know we live in a dangerous world," Mayor Michael Bloomberg said Sunday, describing the incident as a "further reminder of the dangers we face."
After a night that saw most of the theater district under lockdown, Times Square on Sunday was jammed again with tourists, street vendors and shoppers who seemed to view the incident as an unavoidable result of a perilous world.
"No matter what they say about safety, there's no real safety," said Fati Adam, who was in town for the day from neighboring Connecticut. "Even with all the police around, these things happen."
"Look how busy the place is," she added, glancing at the throngs of people jostling for space on the sidewalks beneath a blazing sun. "How can you police everything?"
Police are hoping that hours of footage from cameras positioned around Times Square — packed with major hotels, theaters, stores and office towers — will help identify the driver of the dark green Nissan Pathfinder that came to a stop on West 45th Street near Broadway at 6:28 p.m. EDT Saturday.
Police Commissioner Raymond Kelly said one camera captured images of a man walking swiftly down Shubert Alley, about a half-block from the SUV, glancing over his shoulder in a "furtive manner." Police were searching for the man, described only as white and in his 40s.
Kelly said the man's actions "could be perfectly innocent," but he made clear that his mannerisms drew investigators' attention as they watched the video.
Police also planned to meet with a tourist from Pennsylvania who filmed the police officer on horseback who first responded to calls of a suspicious vehicle. The tourist told police he might have video of the person who was driving the SUV.
An Islamist website on Sunday said that the Pakistani Taliban had claimed responsibility for the bomb, but there was no independent confirmation of the claim, and Kelly said there was no evidence to support it.
In a city notorious for its lack of parking, the SUV that glided to the curbside in the heart of Times Square on a traffic-choked Saturday night was bound to draw attention.
Within minutes, street vendors had become curious about the unattended vehicle with the tinted back windows. Duane Jackson left his handbag stall and trotted across West 45th Street to peer into its front windows, where he saw keys dangling from the ignition.
Lance Orton, a T-shirt vendor, spotted smoke coming from the Pathfinder and alerted a police officer on horseback. In the ensuing minutes, fear spread through the crowds. A series of loud "pops" rang out from the Nissan. Smoke began pouring from the vehicle. People scrambled to get away.
"I ran like everybody else," Jackson said.
Nobody was injured Saturday, and police quickly closed most of the area and brought in a robot to scour the vehicle for explosives.
Kelly said it was unclear why the bomb did not detonate as planned, but he said the Pathfinder concealed a lethal mix of plastic cans filled with gasoline, M-88 firecrackers, three propane tanks, two alarm clocks, wires and a 70-pound metal gun box holding bags of a material "granular in nature."
Police later said the material was fertilizer, which in some forms can be used to make explosives, such as those used by Timothy McVeigh in the Oklahoma City bombing of April 1995 that killed 168 people. However, police said the fertilizer in the SUV was non-explosive.
Still, Kelly said he was told that had the bomb gone off, "the vehicle itself would have at least been cut in half. We were lucky it didn't detonate."
FBI agent George Venizelos, speaking at a news conference Sunday, agreed: "A lot of lives were probably saved."
Kelly said the license plate on the SUV did not match the vehicle but instead belonged to a vehicle traced back to a Connecticut junkyard.
Mayor Bloomberg described the Times Square bomb as "amateurish," in the immediate aftermath of the incident, and on Sunday, said there was no indication it was the work of an international terrorist group.
Other officials described it in more serious terms as the details of the car's contents became known, and most agreed that the incident amounted to a form of terrorism, be it a homegrown lone wolf or someone acting on behalf of an international group such as al-Qaida.
"We're taking this very seriously," Homeland Security Secretary Janet Napolitano said on CNN's "State of the Union." "We're treating it as if it could be a potential terrorist attack."