A well-known Turkish-Armenian editor convicted of insulting Turkish identity has been shot dead in Istanbul
Hrant Dink, editor of newspaper Agos, was shot three times by an unknown gunman outside his offices.
Dink was given a six-month suspended sentence in October 2005 after writing about the Armenian "genocide" of 1915.
Turkey's NTV television said police were searching for a teenager wearing a white hat and a denim jacket in connection with the murder.
The channel showed pictures of a white sheet covering the journalist's body in front of the newspaper building's entrance.
Dink, 53, had received threats from nationalists who viewed him as a traitor, the Associated Press news agency reported.
He was one of Turkey's 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.
Hundreds of thousands of Armenians died in 1915, in what many Armenians say was a systematic massacre at the hands of the Ottoman Turks.
Turkey denies any genocide, saying the deaths were a part of World War I.
Turkey and neighbouring Armenia still have no official relations.
Turkish-Armenian journalist is killed by gunman in Istanbul