Turkey has given its first official statement on how it believes writer Jamal Khashoggi was killed, saying he was immediately strangled.
The statement follows weeks of media reports about the murder at the Saudi consulate in Istanbul on 2 October. Turkey has yet to provide evidence.
Chief prosecutor Irfan Fidan said a meeting with his Saudi counterpart on Monday yielded "no concrete results".
Saudi Arabia has not commented on the meeting.
The Turkish statement said: "In accordance with plans made in advance, the victim, Jamal Khashoggi, was choked to death immediately after entering the Consulate General of Saudi Arabia."
His body was then dismembered and destroyed - "again, in line with advance plans", it added.
Saudi Arabia, at first, denied any knowledge of the death, saying Khashoggi - a well-known government critic - had walked out of the building alive after coming for a meeting.
The Gulf state then admitted Khashoggi's killing was premeditated and a result of a "rogue operation". It said it has arrested 18 suspects, who will be prosecuted in Saudi Arabia.
Turkey, which released a stream of evidence undermining Riyadh's early denials, has demanded more details including the whereabouts of Mr Khashoggi's body and who ordered his killing.
Mr Fidan repeated Ankara's request for the 18 suspects to be extradited to face trial in Turkey, and asked Saudi Arabia's public prosecutor Saud al-Mojeb to disclose the identity of a "local cooperator" who, according to a Saudi official, disposed of Khashoggi's body.
- BBC / Reuters