The Pakistani Taliban reportedly claimed responsibility Sunday for the failed car bombing attempt in Times Square.

According to the Associated Press, a one minute video allegedly released by the group says the attack is revenge for the death of its leader Baitullah Mehsud and killings of top al-Qaida leaders in Iraq.

In the video, images of the dead militants are shown along with a voiceover message.

A U.S. based intelligence group that monitors militant websites uncovered the video.

This, after U.S. Homeland Security Secretary Janet Napolitano called the events of Saturday night's incident in Times Square an "act of terrorism."

During an appearance Sunday on NBC's "Meet the Press," Napolitano said the investigation is in its early stages, but has no reason at this point to believe the incident is connected to any other plots.

"You look for fingerprints, you look for all those kind of traditional things people read, hear about, see on television, and then we also begin looking at, for example, video tape. There's a lot of cameras in that area of New York City," Napolitano said.

Mayor Michael Bloomberg said it all started around 6:30 p.m. Saturday when a t-shirt vendor noticed smoke coming from a Nissan Pathfinder on 45th Street just off Seventh Avenue.

He says the vendor alerted police, who then cleared the streets of thousands of people.

Streets were immediately closed, and several residential and commercial buildings in the area were evacuated.

Inside the SUV, investigators found propane tanks, consumer-grade fireworks, two filled five gallon gasoline containers, and two clocks with batteries, electrical wire and other components.

A robotic police arm broke the windows of the car to remove the materials.

The mayor says surveillance video will be used in the investigation.

"We're looking at all the cameras in the area. It will take many hours. So far we have no reports of anybody running away, nothing on a camera yet. That doesn't mean there won't be when we look at all the cameras, but so far we do not see anybody running away. We do not know who drove the car or when they left the car," Bloomberg said.

Police reopened most of Times Square by late Sunday morning. The mayor also urged residents and tourists to go about their business as usual.

Additionally, all Broadway matinee and evening shows went on as scheduled Sunday.

While no one has been taken into custody, Police Commissioner Ray Kelly says surveillance video showed the car driving west on 45th Street before it parked between Seventh and Eighth Avenues.

"The vehicle itself will be examined for any trace evidence, DNA...some of that will go on here but most of it will go on in a location where we examine vehicles," Kelly said.

Police removed the SUV from the scene Sunday and took it to the NYPD's facility in Queens for further forensic testing.

Authorities say a Connecticut license plate on the vehicle did not match up.

The mayor says police interviewed the Connecticut car owner, who told them he had sent the plates to a nearby junkyard.

After learning of the response efforts in Times Square, Governor David Paterson released a statement commending the work of the NYPD.

In it, he said, "Tonight, we owe an incredible debt of gratitude to the heroic actions of the New York City Police Department and to a single vigilant New Yorker who identified a suspicious vehicle near Times Square in New York City. Luckily, no one is hurt, and now the full attention of city, State and federal law enforcement will be turned to bringing the guilty party to justice in this act of terrorism."

The Federal Bureau of Investigation also released a statement saying, "The FBI Joint Terrorism Task Force in New York, along with the NYPD has responded to Times Square in response to the vehicle and device. Bomb technicians, Evidence Response Team members and investigators are on scene and a command post has been established. All of the resources of the New York FBI office are available to assist with this ongoing investigation. Numerous initial reports will be checked and authenticated and the appropriate leads will be set. More information will be forthcoming as soon as it is available and appropriate for release."

President Barack Obama also praised the quick response by the NYPD and said the federal government is prepared to provide support.