A former aide to Vladimir Putin who was found dead in a Washington hotel room died of blunt force trauma to the head, a postmortem examination has found.
District of Columbia police spokesman Hugh Carew confirmed the results for Mikhail Lesin, who was found at the Dupont Circle Hotel in November.
The DC Medical Examiner's Office said in a statement that other contributing causes were blunt force injuries to the neck, torso, arms and legs.
Russian media had reported that Mr Lesin suffered a heart attack, citing relatives.
Mr Carew said police continue to investigate the death.
Mr Lesin was a media adviser to the Russian president who helped found the English-language news service Russia Today.
Russian foreign ministry spokeswoman Maria Zakharova said the Russian Embassy in Washington has made multiple requests for information about the investigation into the death, but has received no substantive material.
