Jamal Khashoggi’s death is being investigated as a premeditated crime, according to prosecutors in Saudi Arabia who are looking into the murder of the dissident and Washington Post columnist.

Saudi Attorney General Saud al-Mojeb received information from Turkish officials that he said on Thursday helped him reach that conclusion, according to a statement put out in the state-run Saudi Press Agency.

“[T]he Public Prosecution received information from the Turkish side through the joint working team between the Kingdom of Saudi Arabia and the Republic of Turkey [that] indicates that the suspects in the incident had committed their act with a premeditated intention,” the statement said.

Details have emerged that suggest Khashoggi was targeted during his scheduled meeting at the Saudi consulate in Istanbul Oct. 2. Khashoggi, a Saudi dissident and green card holding resident of Virginia, went to the facility to obtain the paperwork to marry his Turkish fiancee, but was never seen again.

Riyadh maintains that it had no knowledge of the incident and was in no way involved in his death.

“The public prosecution continues its investigations with the accused in the light of what it has received and the results of its investigations to reach facts and complete the course of justice,” the statement said. There was no elaboration on what evidence the prosecution received.

There were 15 men thought to be involved in Khashoggi’s death, including an aide to Saudi Crown Prince Mohammad Bin Salman, who was seen on surveillance footage entering the consulate before Khashoggi.

Another man reportedly involved in the murder, who seemed to be used as a body double for Khashoggi, was seen on camera wearing the journalist’s clothing.

Saudi Arabia announced over the weekend that they had arrested 18 Saudis they linked to the killing, and fired five top officials.