With the 19-year-old suspect in the Boston Marathon bombings finally awake and apparently answering questions, authorities are eager to see if their suspicion that he and his older brother were planning on hitting targets beyond Boston will be confirmed.

Dzhokhar Tsarnaev, who was found bleeding in a boat at the end of a lengthy manhunt on Friday, is said to be responding to some questions in writing (thanks to a possibly self-inflicted gunshot wound to the throat, Tsarnaev can't speak). The feds haven't read him his Miranda rights, invoking the "public safety exception," exactly so they can find out about possible other bombers and plots. And while most authorities agree the brothers acted alone (despite almost-certainly erroneous reports of a "12-man sleeper cell" pimped by Drudge and others), The New York Times reports that they likely were planning on a spree going beyond Boston:

The two men suspected in the Boston Marathon bombings were armed with a small arsenal of guns, ammunition and explosives when they first confronted the police early Friday, and were most likely planning more attacks, the authorities said Sunday. [...]

Mr. Davis told CBS News’s “Face the Nation” on Sunday: “We have reason to believe, based upon the evidence that was found at that scene — the explosions, the explosive ordnance that was unexploded and the firepower that they had — that they were going to attack other individuals.”

Beyond that, little new information has surfaced. The FBI is said to be interrogating Tsarnaev's American-born wife, Katherine, and the brothers' uncle Ruslan is telling reporters he believes Tamerlan was radicalized in 2009 by "a recent convert to Islam." There's a long and well-reported Wall Street Journal article about the Tsarnaev family and Tamerlan's extremism. And Buzzfeeᴅ has an article in which Tamerlan's friend Ray speculates, without much cause, that Tamerlan may have murdered someone before the bombing.

[NYT, image via AP]