Turkey’s foreign ministry says Turkish authorities will search the Saudi Consulate in Istanbul as part of an investigation into missing Saudi journalist Jamal Khashoggi.

The ministry says in a statement released on Tuesday that Saudi authorities have notified Ankara that they were “open to cooperation” and would allow the consulate building to be searched.

The ministry didn’t say when the premises would be searched.

Khashoggi disappeared a week ago after entering the consulate to obtain paperwork required for his marriage to his Turkish fiancee.

Turkish officials have alleged he was killed in the compound while Saudis officials said he left the building unharmed.

The Washington Post has published an image it described as the last surveillance photograph of its missing Saudi contributor.

The Post’s image showed Jamal Khashoggi walking into the Saudi Consulate in Istanbul a week ago. Khashoggi disappeared immediately afterward.

This image taken from CCTV video obtained by the Turkish newspaper Hurriyet claims to show Jamal Khashoggi entering the Saudi consulate in Istanbul on October 2, 2018. CCTV/Hurriyet via AP

The image released on Tuesday bore a date and date stamp. The Post said “a person close to the investigation” shared the image with them.

The 59-year-old Khashoggi went missing while on a visit to the consulate in Istanbul for paperwork to marry his Turkish fiancée.

Turkish officials and Khashoggi’s friends have told The Associated Press they fear the writer was killed at the consulate. Saudi Arabia has denied the allegations as “baseless”, but offered no evidence to show he ever left the building.