NEW YORK - The surviving suspect in the Boston bombings has told investigators that he and his brother planned to bomb Times Square, New York City Mayor Michael Bloomberg said Thursday.
"Last night we were informed by the FBI that the surviving attacker revealed that New York City was next on their list of targets," Bloomberg said.
The two came up with the plan spontaneously after the Boston bombing, as the talked in a car they hijacked, New York City Police Commissioner Ray Kelly said.
Dzhokhar Tsarnaev initially told investigators that he and his brother had talked about going to New York to "party," but after further questioning he revealed that they planned to use remaining explosives there, Kelly announced.
Sources: No gun found in boat
Dzhokhar Tsarnaev apparently was unarmed when he was wounded in a barrage of gunfire that ended with his capture after a tense standoff, sources told CNN Thursday.
No firearm was found in the boat where he was hiding, in the yard of a home in the Boston suburb of Watertown, Massachusetts, said several sources familiar with the investigation, from different agencies.
Earlier, Tsarnaev and his older brother, Tamerlan Tsarnaev, had allegedly shot and killed a Massachusetts Institute of Technology campus police officer sitting in a patrol car. Shortly afterward, the two engaged in a shootout with police. Tamerlan, 26, died after the shootout.
It's unclear why Dzhokhar, 19, may have hidden without any weapons.
Authorities have previously said in a criminal complaint that there was a standoff involving gunfire before Dzhokhar's capture.
Watertown Police Chief Edward Deveau told CNN's Wolf Blitzer on Saturday that it was his understanding that the suspect fired from the boat.
Dzhokhar Tsarnaev remains in fair condition at a Boston hospital, where he has communicated with authorities.
Authorities in the Russian region of Dagestan interviewed the suspects' parents in the search for clues and insight into what may have led the brothers to turn the Boston Marathon finish line into a gruesome scene of terror.
Suspects' father heads to U.S.; mother insists bombing fake
Anzor Tsarnaev, the suspects' father, is expected to come to the United States to assist investigators. He told reporters he may leave as early as Thursday.
The suspects' mother, speaking to CNN's Nick Paton Walsh, didn't want to accept the reality of the bombing, saying it was fake.
"That's what I want to know, because everybody's talking about it -- that this is a show, that's what I want to know. That's what I want to understand," said Zubeidat Tsarnaev.
She has seen a video pushing the wild idea, she said, adding that there was no blood -- and that paint was used instead.
But her disbelief broke down when she spoke of the victims.
"I really feel sorry for all of them. Really feel sorry for all of them," she said, her voice cracking. But she remained resolute that her sons, Dzhokhar, 19, and Tamerlan, 26 were not involved.
Dzhokhar faces terrorism and murder charges.
His mother is not coming to the United States.
She's wanted on 2012 felony charges of shoplifting and property damage in Massachusetts, according to court officials.
The family lived there before she jumped bail; the parents moved the same year to Dagestan, a semiautonomous region of Russia, officials said.
Tamerlan Tsarnaev's body remains unclaimed. Relatives in the United States have publicly said they are ashamed of the two young men. Several Boston-area imams have said they would feel uncomfortable presiding over Tamerlan's funeral.
Detonated by remote
The brothers used a remote control device similar to those used to guide toy cars to detonate the two bombs in Boston, said Rep. Dutch Ruppersberger, a Maryland Democrat and member of the House Select Committee on Intelligence.
A law enforcement official told CNN Thursday that at least one of the two bombs -- the second to explode -- was detonated by remote control.
While video taken near the scene of the explosions shows Dzhokhar Tsarnaev talking on a cell phone, it is not known whether he used it to trigger a device, a law enforcement official said.
Tsarnaev has indicated that his older brother planned the attack and described him and his brother as self-radicalized jihadists, according to a U.S. government source.
He has denied any direct influence from terror organizations such as al Qaeda.
The teenager cited the U.S. wars in Afghanistan and Iraq as motivating factors behind the attack, a U.S. government official said.
He has been charged with using and conspiring to use a weapon of mass destruction resulting in death and one count of malicious destruction of property by means of an explosive device resulting in death.
Of the more than 260 people who were hurt in the marathon bombings, 33 were still hospitalized Wednesday night, according to a CNN tally. One person was in critical condition at Boston Medical Center.
According to a source familiar with the investigation, authorities are looking