Mikhail Lesin also suffered injuries to his neck, torso and upper and lower extremities, the Washington Post reported, citing the US capital's medical examiner's office.
Lesin, who helped launch the Russian English-language television network RT, was found dead in November at the age of 57.
The findings contradict Russian state media reports, which said the former minister of media affairs died of a heart attack.
The Post quoted Washington police spokesman Dustin Sternbeck as saying that the case remains under investigation.
Sternbeck and the medical examiner's office could not immediately be reached for comment.
A controversial figure, Lesin had been accused of limiting press freedom in Russia.
He was Russia's minister of press, television and radio between 1999 and 2004, and later served as a Kremlin aide.
In 2013, he became head of Gazprom-Media Holding, the media arm of state energy giant Gazprom, and oversaw the work of Russia's top liberal radio station Echo of Moscow.
Lesin resigned a year later, citing family reasons.
"We are waiting for Washington to give us the relevant information and official data about the investigation," Zakharova wrote, adding that Russia would send the US a request for "international legal assistance" if the information circulating in the media turned out to be true.
An unnamed representative of the Russian embassy in Washington was quoted by the RIA Novosti state news agency as saying: "We intend to make requests (to the US) in order to receive answers to the questions that are worrying the Russian side."
He allegedly amassed millions of dollars in assets in Europe and the United States while working for the government, including USD 28 million in real estate in Los Angeles.
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