Turkey searched the Saudi consulate in Istanbul for a second time overnight as part of a probe into the disappearance of journalist Jamal Khashoggi, while the French and Dutch finance ministers pulled out of a Riyadh investment summit amid global criticism of the kingdom.

U.S. President Donald Trump said he was awaiting a full report on what had happened to Khashoggi from Secretary of State Mike Pompeo after the envoy met with Saudi and Turkish leaders, and said he did not want to abandon his Saudi ally.

Turkish officials say they believe Khashoggi — a U.S. resident and Washington Post columnist critical of Crown Prince Mohammed bin Salman — was murdered at the Saudi consulate in Istanbul on Oct. 2 and his body removed.

Saudi Arabia has denied involvement in Khashoggi's disappearance. Trump has speculated without providing evidence that "rogue killers" could be responsible.

How Western allies deal with Riyadh will hinge on the extent to which they believe responsibility for the affair lies with Prince Mohammed and the Saudi authorities.

Trump, who has forged closer ties with Saudi Arabia and the 33-year-old crown prince in an effort to counter Iranian influence in the region, has appeared unwilling to distance himself too much from Riyadh. He has cited tens of billions of dollars in potential arms deals.

Other Western nations have expressed concern about Khashoggi's disappearance, but face a similarly delicate situation in their dealings with the world's top oil exporter.