Istanbul's chief prosecutor has filed warrants for the arrest of a top aide to Saudi's de facto ruler and the deputy head of intelligence on suspicion of planning the killing of Jamal Khashoggi.

The prosecutor's office has concluded there is "strong suspicion" that al-Qahtani and General al-Asiri, who were removed from their positions in October, were among the planners of the 2 October killing at the Saudi consulate in Istanbul.

The chief prosecutor's office in Istanbul filed an application on Tuesday to obtain the warrants for the men, described in court documents as being "among the planners" of the murder. (ILKHA)