(REUTERS) — U.S. President Donald Trump increased pressure on Saudi Arabia on Wednesday to provide information on what happened to missing Saudi journalist Jamal Khashoggi and said he wanted to get the bottom of what he called “a very serious situation.”

In a fresh clue, a pro-government Turkish daily on Wednesday published preliminary evidence from investigators it said identified a 15-member Saudi intelligence team involved in Khashoggi’s unexplained disappearance on Oct. 2.

Pressure appeared to be building worldwide on close U.S. ally Saudi Arabia on the whereabouts of Khashoggi, a prominent critic of Saudi policies, who was last seen entering the Saudi consulate in Istanbul to get documents for his planned marriage.

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