The top U.S. diplomat advised President Donald Trump on Thursday to give Saudi Arabia more time to investigate journalist Jamal Khashoggi's disappearance even as Treasury Secretary Steven Mnuchin abandoned plans to attend an investor conference in Riyadh, putting the high-profile event in question.

In Istanbul, Turkish investigators for a second time searched the Saudi Consulate where Khashoggi — a U.S. resident and Washington Post columnist who was a strong critic of Crown Prince Mohammed bin Salman — vanished on Oct. 2, seeking clues about an incident that has caused an international outcry.

President Donald Trump met at the White House for less than an hour with U.S. Secretary of State Mike Pompeo, who provided an update on his talks this week with Saudi and Turkish officials. Turkish officials have said they believe the Saudi journalist was murdered at the consulate and his body chopped up and removed.