A state medical report says the deceased suspect in the Boston Marathon bombings died from gunshot wounds to the torso and extremities, and from blunt trauma.
The document, seen Friday by reporters, also states that suspect Tamerlan Tsarnaev was shot by police and run over and dragged by a vehicle.
The report confirms Boston area police accounts of events early April 19, when 26-year-old Tamerlan Tsarnaev and his 19-year-old brother Dzhokar led police on a chase in a hijacked car. Authorities at the time said Tamerlan was wounded in an ensuing shootout and that his brother ran over him as he fled the scene in the stolen vehicle.
Tamerlan Tsarnaev died four days after the marathon bombings that killed three people and wounded more than 260 others. His brother remains in police custody, accused of using weapons of mass destruction.
Police say the duo also killed a Boston area police officer shortly before Tamerlan Tsarnaev was killed.
Meanwhile, authorities are being quoted as saying DNA fingerprints found on explosive fragments at the scene of the April 15 bombings do not match those of the deceased suspect's wife. The New York Times also reported that DNA samples do not match, either.
Katherine Russell, the widow of Tamerlan Tsarnaev, initially came under police scrutiny when female DNA was found on a piece of pressure cooker used to contain one of the homemade bombs used in the blasts.
Police are also reported focusing on Russell after finding al-Qaida's Inspire magazine and other radical Islamist material on her computer.
Officials have said the Tsarnaev brothers were originally planning attacks for July 4 -- U.S. Independence Day -- and had considered suicide bombings. Dzhokhar reportedly told the FBI that the brothers moved up their attack plans to April 15 because they finished building their bombs sooner than expected.
Both April 15 and July 4 are occasions for large patriotic celebrations in Boston.