New York Times Square attack may have been next for Tsarnaevs, report says

Tamerlan (left) was killed during the manhunt. Dzhokhar was captured last Friday night. Photo: FBI

(AP/ABC7) -{ } The brothers believed to be responsible for bombing the Boston Marathon discussed detonating more bombs in New York City before their plans went awry, Mayor Michael Bloomberg says.

According to law enforcement sources to who spoke to ABC News, Tamerlan Tsarnaev and his younger brother, Dzhokhar, were planning on driving to New York on Thursday night to detonate more bombs in Times Square.

New York City Police Commissioner Raymond Kelly says the two suspects had a pressure cooker bomb and five pipe bombs they wanted to set off.

Those plans were derailed, though, when the person they carjacked in Boston late Thursday escaped. That touched off a chase and gun fight through the streets of suburban Boston that killed Tamerlan, 26, and set off a massive manhunt for Dzhokhar, 19.

After a day-long search that paralyzed the entire city of Boston, Dzhokhar was found hiding inside a boat in Watertown, just west of downtown Boston. He has been charged with using a weapon of mass destruction.

According to ABC News, Dzhokhar originally told investigators that he and his older brother planned to go to New York to "party" in the aftermath of the Boston bombings. However, shortly thereafter, sources tell ABC the younger brother changed his story.

At that point, he told investigators that he and Tamerlan were planning a follow-up attack in New York City.

During that chase through Cambridge and Watertown, the Tsarnaev brothers tossed explosive devices toward pursuing law enforcement officers. Several of them exploded.

Three people were killed and more than 200 were injured in the April 15 attacks. Officials believe the Tsarnaev's set off two pressure cooker bombs on Boylston Street in the final mile of the Boston Marathon.

In Russia Thursday, the two suspects' parents sat side by side responding to questions about their sons' alleged involvement

The mens' mother emphatically denying their guilt.

“I know my kids have nothing to do with this. I know this. I'm mother. I know my kids,” Zubeidat Tsarnaev, the men’s mother says.

The father of the suspected bombers, says he is cooperating with investigators, and is expected to arrive in the U.S. as early as Friday.

But suspects mother, who was charged with shoplifting in a Boston suburb last summer, hasn't decided if she would make the trip, for fear she could be re-arrested.

This is a developing story. More to come.