The acclaimed Ukrainian author Victoria Amelina passed away from her wounds on Wednesday after a Russian missile on Tuesday struck a pizza shop in the eastern city of Kramatorsk.
The war crimes researcher is now the 13th victim of the assault.
The doctors "did everything they could to save her life, but sadly the wound was fatal," according to the writers' organization PEN Ukraine.
Human rights advocates have referred to the assault as a war crime.
Despite being near regions of Ukraine that are occupied by Russia, Kramatorsk is a Ukrainian city.
When the missile struck, Amelina, 37, was having dinner with a group of journalists and writers from Colombia in the city's well-known Ria Lounge. The attack also injured about 60 other people.
She was taken to a hospital in Dnipro right away but died on Friday from her wounds, according to PEN Ukraine.
The organization released a statement saying, "It is with great sorrow that we inform you that the writer Victoria Amelina's heart stopped beating on July 1.".
"Victoria's family and friends were by her side in her final days. " .
Amelina, one of the most well-known young writers in Ukraine, began recording war crimes following Russia's extensive invasion the previous year. She also began working with kids close to the front lines.
Volodymyr Vakulenko, a children's author who was kidnapped and killed by Russian troops in the city of Izyum shortly after the invasion, had a diary that she discovered last year.
War and Justice Diary: Looking at Women Looking at War, her first nonfiction book in English, is soon to be released.
PEN Ukraine and war crimes watchdog Truth Hounds said that Amelina had traveled to the frontlines with them, and earlier statements from both organizations confirmed that she had been hurt in the attack.
They claimed that Victoria was now also a victim of a war crime.
Amelina can be seen taking a picture of a bombed building in Ukraine in a tweet that was pinned to her Twitter profile.
The post states, "This is me in the photo.".
"I'm a writer from Ukraine. On my bag are pictures of famous Ukrainian poets. I appear as though I ought to be taking photographs of my young son, artwork, and books. However, I record Russia's war crimes and listen to gunfire instead of poetry.
. Why?"