With more than 2,500 people injured, authorities say the marathon bombing suspect is in critical condition and a critical but stable condition in the intensive care unit at Boston Medical Center.
Deval Patrick said Sunday that the suspect, Dzhokhar Tsarnaev, was admitted to the hospital after undergoing surgery.
Patrick said he did not know how long Tsarnaev had been hospitalized and said he was expected to be released Sunday.
The governor added that authorities had no information about how long he had been in the hospital.
Patrick did not say when Tsarnaev would be released from the hospital, and the governor said that his condition was not good.
Massachusetts Governor Deval PATRICK: I did not have any information about the individual being transported to the intensive-care unit, whether he is in stable condition, or whether he will be released in the next 24 hours.
He is not responding well.
There is no information at this point to indicate that he will make any other significant progress in the critical care unit.
Authorities have been struggling to track down the suspects brother, Tamerlan Tsarnaev, who is believed to be holed up in a Boston home after the Boston marathon bombing, where he has reportedly barricaded himself with hostages.
Tsarnaev, a native of Chechnya, was the subject of a massive manhunt in the aftermath of the bombings, which killed three people and wounded more than 260.