Hrant Dink was one of the writers who had been prosecuted under Turkey's strict laws against "insulting Turkishness."
He was given a six-month suspended sentence in October 2005 after writing about the Armenian genocide of 1915.
Turkey denies Armenian genocide, saying the deaths were a part of World War I.
Dink, 53, had received threats from nationalists who viewed him as a traitor.
He was a public figure in Turkey - one of its most prominent Armenian voices.
He once gave an interview with the Associated Press in which he cried while describing the hatred some Turks had for him, saying he could not stay in a country where he was unwanted.
"His loss is the loss of Turkey," Koru said.
By Armenian Public Radio