Harlem Desir, the media freedom representative at the Organization for Security and Co-operation in Europe, said he was "horrified" by Babchenko's death.
The reports of Babchenko's assassination took off yesterday when his wife Olechka called the hospital after finding his bullet-ridden body in their Kiev apartment.
Russian journalist Arkady Babchenko, widely reported to have been assassinated in Kiev on Tuesday, is alive and well.
Babchenko, 41, one of Russia's best-known war reporters, spoke and wrote about leaving the country because of repeated threats that he and his family would be harmed.
Ukrainian Prime Minister Volodymyr Groysman said in a social media posting late on Tuesday he was convinced what he called "the Russian totalitarian machine" had not forgiven Babchenko for what Groysman called his honesty.
Babchenko left Russian Federation in February 2017, saying he was receiving threats and concerned he might be jailed. The incident killed all 92 passengers on board, including the members of a renowned Russian military choir and several staffers for state news agencies. While western media all reported that yet another journalist vocal in his criticism of the Kremlin had been murdered, Russian audiences learned that Ukraine would probably present the killing in this way, with some politicians adding how the killing only proved how risky it supposedly is to be a journalist in Ukraine.
Ukrainian police circulated the Babchenko killer's suspect sketch showing 40-45 y.o. man with grey beard.
Multiple Ukrainian officials originally blamed Babchenko's death on Vladimir Putin because he has been criticizing the Kremlin's policies for years.
Babchenko fled Russian Federation past year, fearing for his life, and settled in Ukraine.
"Now in Russian Federation, the most important enemy is the United States", Babchenko added.
At the event, he also shared his fears prior to leaving Russian Federation, comments that would prove to be eerily prescient given Tuesday's shooting outside his home: "For years I thought I'd be arrested", Babchenko said then.