While Pompeo was in Riyadh, Trump said on Twitter that he had talked with the crown prince, the country's de facto leader, "who totally denied any knowledge of what took place in their Turkish consulate". The incident has resulted in a global outrage, more so in the United States as he lived here as a legal permanent resident and worked for "The Washington Post".
Turkish crime-scene investigators entered the residence of the Saudi consul general in Istanbul on Wednesday to search for evidence in the disappearance of Saudi writer Jamal Khashoggi, just as Turkey's daily Yeni Safak published a gruesome recounting of his alleged slaying.
Khashoggi, a critic of Prince Mohammed's regime, hasn't been seen since he entered the consulate October 2 to retrieve a document for his planned wedding.
Asked whether he'd instructed the FBI to investigate the case, Trump responded: "I'm not going to tell you".
Mr Khashoggi appeared regularly on Arab talk shows and moved to Washington a year ago.
"Government welcomes the ongoing diplomatic interaction between the Republic of Turkey and the Kingdom of Saudi Arabia, as well as the investigation which seeks to get to the bottom of this matter", Mabaya said.
"We have lots of important relationships - financial relationships between USA and Saudi companies, governmental relationships, ... the efforts to reduce the risk to the United States of America from the world's largest state sponsor of terror, Iran", he said.
German train station shut down after woman taken hostage
Deutsche Bahn said the station will be closed until further notice and all traffic - including long-distance - has been suspended. Ambulances and heavily-armed police were lined up behind the train station, the daily Koelner Stadt-Anzeiger reported.
Pompeo came to Ankara after Riyadh where he held a 20-minute talk with King Salman and then a brief meeting and much lengthier dinner with his son Prince Mohammed.
President Trump said Wednesday the United States has requested from Turkey any video and audio related to the presumed death of activist Jamal Khashoggi, amid news reports of the existence of audio capturing his killing.
Turkish officials claim they have proof a 15-member Saudi hit squad killed Khashoggi inside Saudi Arabia's consulate in Istanbul.
English-language state broadcaster TRT World says Turkish officials believe the Saudis may have taken the consulate's CCTV footage with them when they returned to the kingdom. The Turkish government alleges he was murdered, a charge the Saudis have vehemently denied.
US President Donald Trump has issued varied responses, most recently giving credence to Saudi denials and comparing the treatment of Saudi Arabia to that of his Supreme Court nominee, and now justice, Brett Kavanaugh.
The controversy has blown a massive hole in Prince Mohammed's bid to promote himself as the modern face of Saudi Arabia and led to a spate of cancelations by attendees at a major Riyadh investment conference scheduled next week.
The newspaper said three other people have been linked by the Times to the Crown Prince's security detail, and another one has has been identified as a forensic doctor who specializes in autopsies and who held a senior position in the Saudi Interior Ministry.