(CNN) — Here are some of the latest developments in the Boston Marathon bombing investigation:
— Dzhokhar Tsarnaev, the surviving suspect in the Boston Marathon bombings, has been transferred from the Beth Israel Deaconess Medical Center to Federal Medical Center Devens, a Federal Bureau of Prisons facility in north-central Massachusetts that holds detainees who need medical care, U.S. Marshals Service spokesman Drew Wade said Friday.
— The parents of the Boston Marathon bombing suspects have left their home in Dagestan for another part of Russia, the suspects’ mother Zubeidat Tsarnaev told CNN Friday. She said the suspects’ father, Anzor Tsarnaev, is delaying his trip to the United States indefinitely.
— Anzor Tsarnaev, the father of the Boston Marathon bombing suspects, had agreed to fly to the United States to cooperate in the investigation. He was to take off as early as Friday, but Thursday his wife called an ambulance for him. He was not on an early Friday flight leaving Makhachkala, Dagestan, which serves as the first leg of travel to the United States.