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A Turkish police officer walks outside the Saudi Arabia consul general residence in Istanbul, Thursday, Oct. 18. Turkish crime-scene investigators finished an overnight search of both residence and a second search of the consulate itself amid Ankara's fears that Saudi writer Jamal Khashoggi was killed and dismembered inside the diplomatic mission in Istanbul. (AP Photo/Lefteris Pitarakis)

Security officials secure an entrance as U.S. Secretary of State Mike Pompeo meets with Turkish Foreign Minister Mevlut Cavusoglu in Ankara, Turkey, Wednesday Oct. 17, 2018. On Wednesday a pro-government Turkish newspaper published a report made from what they described as an audio recording of Saudi writer and journalist Jamal Khashoggi's alleged torture and slaying at the Saudi Consulate in Istanbul. (Leah Millis/Pool via AP)

Firefighters work at a scene of fire from an explosion in Ankara, Wednesday, Feb. 17, 2016. A large explosion, believed to have been caused by a bomb, injured several people in the Turkish capital on Wednesday, according to media reports. (IHA via AP)

Policemen secure the historic Sultanahmet district after an explosion in Istanbul, Tuesday, Jan. 12, 2016. An explosion killed at least 10 people and wounded 15 others Tuesday morning in a historic district of Istanbul popular with tourists. Turkish President Recep Tayyip Erdogan said a Syria-linked suicide bomber is believed to be behind the attack. (AP Photo/Emrah Gurel)