Istanbul (CNN) A bomb blast ripped through the Istanbul offices of a radical, pro-ISIS magazine killing a writer and wounding its editor-in-chief as well as two other people on Wednesday night.

According to a Turkish police statement, "a bomb left at the magazine's entrance door exploded when the door opened."

The magazine "Adimlar" regularly publishes angry anti-American content, including articles that celebrate convicted Venezuelan terrorist Ilich Ramirez Sanchez, better known as "Carlos the Jackal."

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In an interview with CNN in October, the magazine's chief editor, Ali Osman Zor, mounted a spirited defense of the ultra-violent jihadi group ISIS.

Zor is a self-described "Islamic revolutionary" and member of a group called the Great Eastern Islamic Raiders' Front who has served prison time in Turkey for terrorism convictions.

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