A Syrian journalist who was shot in the head by "Islamic State" (ISIS) terrorists in southern Turkey died in hospital on Tuesday, activists said.

Hours before Mohammed Zaher al-Shurqat died from his wounds, ISIS claimed responsibility for Sunday's attack in the town of Gaziantep via a website.

Syrian activist Assaad al-Achi, who also lives in Gaziantep, confirmed the journalist's death, as did fellow activist Ibrahim al-Idelbi, who also lives
there.

"This is a threat to all free thinkers who are fighting extremism and living in Turkey," Idelbi told AFP via the Internet.