Saudi journalist Jamal Khashoggi was strangled as soon as he entered his country’s consulate in Istanbul and his body was then dismembered and destroyed, Turkish authorities said. They accused high-level officials of ordering the murder that has unleashed international fury against the kingdom.

The charges came in a rare statement to the press from Istanbul’s chief prosecutor and in remarks by the ruling party’s spokesman late on Wednesday in a clear signal that Turkey is not dropping its pressure campaign on Saudi Arabia in the wake of Khashoggi’s brutal killing in Istanbul Oct. 2.

Khashoggi’s body was cut up and destroyed after his death in a premeditated attack, the prosecutor’s office said in its first official confirmation of some of the details of the grisly murder that anonymous Turkish sources have leaked to the media over the past month. The statement was issued after negotiations with Saudi Arabia’s public prosecutor, who was in Istanbul this week following a pledge to cooperate in the Turkish investigation.

“Despite all of our good intentions, no concrete result was obtained from the meetings,” the prosecutor said, outlining three central unanswered questions: Where are Khashoggi’s remains, what evidence has the Saudi investigation unearthed and who is the purported “local collaborator” that Saudis claim helped dispose of the body?