Saudi Arabia's ambassador to Britain, Prince Khaled bin Bandar, has revealed for the first time where the former Royal Court advisor Saud al-Qahtani is being interrogated.

The Saudi ambassador said that Saud al-Qahtani is under investigation at his home, after no evidence of his involvement in the murder of journalist Khashoggi was found.

This was in a video clip during his participation in a seminar organized by the Royal United Services Institute in the city of Westminster, one of the oldest research centers on international defense and security in the world.

In a video clip of the seminar revealed by the media on Thursday, Khalid bin Bandar said Turkey had not cooperated with his country in providing evidence that it possessed and would condemn al-Qahtani in the murder of Khashoggi.

In recent months, there have been several rumors about the fate of al-Qahtani, most notably talk of sensitive sites still at his disposal, in light of the denial of his dismissal from all positions, according to foreign media.

In January, the Washington Post questioned al-Qahtani's whereabouts and said he had recently been seen in the city of Jeddah, according to a resident, and in the offices of the royal court in the capital Riyadh, according to a person working with the government.

The paper also quoted a source close to the royal court believing that al-Qahtani was under house arrest, but was not sure.

On October 2, 2018, Khashoggi was killed inside his country's consulate in Istanbul, and the case has become one of the most prominent and widely circulated on the international agenda since then.

On December 5, 2018, the Turkish judiciary issued an arrest warrant for al-Qahtani and former Saudi deputy intelligence chief Ahmed Asiri on suspicion of involvement.