Istanbul, Turkey (CNN) A prominent Saudi journalist and critic of the current Saudi leadership has been missing since he entered his country's consulate in Istanbul on Tuesday, according to his fiancée and other sources familiar with the events.

Jamal Khashoggi went to the consulate to obtain paperwork that would allow him to get married. He entered the building at 1:30 p.m. and has not left since, Turan Kislakci, the head of the Turkish Arab Media Association and a friend of Khashoggi, told CNN.

Turkish police have reportedly examined surveillance footage from the area and say there is no sign of Khashoggi leaving the consulate, Kislakci added. The Turkish Arab Media Association said members would remain outside the consulate to keep up the public and media pressure.

His fiancée, who asked not to be named, told CNN she has been outside the consulate since he entered the building.

"I do not know if Jamal is inside. I want to know where Jamal is. Did they detain him? Did they kidnap him? Is he imprisoned?" said his visibly tired fiancée.

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