(NECN: Josh Brogadir, Boston) - Dzhokhar Tsarnaev is now spending his seventh night at Beth Israel Deaconess Medical Center and is said to be in fair condition.
It's unclear when he may be transferred elsewhere, but on Thursday, officials revealed details about where he and his older brother Tamerlan may have been headed next.
The surviving suspect, Dzhokhar Tsarnaev, has been at Beth Israel Deaconess Medical Center in Boston since Friday night, and had his initial appearance Monday in his hospital room on charges he used weapons of mass destruction to destroy lives at the Boston Marathon.
But in between Friday and Monday at the hospital, investigators say he revealed to them a second sinister plot.
"In the car they made a decision to go to New York with the remaining explosive devices that they had and to detonate one or more in Times Square," said New York City Police Commissioner Ray Kelly.
Briefed by federal investigators, Commissioner Kelly says the Tsarnaev brothers were allegedly bound for Manhattan where they intended to use six remaining homemade bombs, and one was a pressure cooker-type device like the ones used at Boylston Street and the other five were pipe bombs.
It's a plot that brings to mind the failed Times Square bombing attempt of Faisal Shazhad in May 2010.
Given the shootout in Watertown, the death of older brother Tamerlan and the subsequent arrest of Dzhokhar, the Times Square plot never materialized.
"We don't know if we would have been able to stop the terrorists if they arrived here from Boston. We're just thankful that we didn't have to find out that answer," said New York City Mayor Michael Bloomberg.
Commissioner Kelly says Dzhokhar had been in Times Square twice in the past year with friends in November and April of 2012, and his intentions are unknown.
At about the same time as the news conference in New York, three suspicious letters were found at a loading dock here at Beth Israel Deaconess Medical Center.
One was addressed to the suspect, with his first and last name, a second to the hospital, and a third we were not able to see clearly from our vantage point.
All three were examined by state police bomb techs and photographed, and it was determined there was no immediate threat.
There are reports that Dzhokhar Tsarnaev will be moved to a secure medical facility in one of the region's prisons.
Whether that will happen in the next few hours or in the coming days is not clear.