On Saturday, Dzhokhar Tsarnaev was brought in severely injured

Apr 22, 2013 06:39 GMT  ·  By

19-year-old Dzhokhar Tsarnaev is being interrogated on the Boston bombings, after regaining consciousness following injuries to his leg and neck.

CBS News informs that Tsarnaev is now answering officials' questions in writing. There is no indication on whether or not the gunshot wound to his neck has been self-inflicted.

He was brought in at Beth Israel Deaconess Medical Center in Boston on Saturday with severe, life-threatening injuries.

“The older brother’s dead now. We have the second one ... in very serious condition. We don’t know if we’ll ever be able to question the individual,” Mayor Thomas M. Menino said at the time, according to Hollywood Gossip.

26-year-old Tamerlan Tsarnaev died in a police chase in Watertown, Massachusetts. Police found his younger brother hiding out on a boat in the area, detaining him on Saturday.

While Menino claimed that the suspects did not have any accomplices, police commissioner Ed Davis assessed that this was not the only bombing that they had planned.

“All of the information I have is they acted alone, these two individuals, the brothers,” Menino tells reporters.

“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,” Davis notes.

As we wrote, the Tsarnaev brothers threw IEDs at police cars out of their own vehicle, as they led authorities to Watertown.

“This was as dangerous as it gets in urban policing,” Davis adds.

The FBI found several unexploded bombs in Tsarnaev's possession and booked him without reading him his Miranda rights.

“Exclusively relying on the public safety exception to Miranda could very well be a national security mistake. It could severely limit our ability to gather critical information about future attacks from this suspect,” some Republican lawmakers commented.