Turkish police are to search the Saudi consul’s residence in Istanbul over the disappearance and alleged murder of journalist Jamal Khashoggi.
Mr Khashoggi has not been seen since entering the Saudi consulate in Istanbul nearly two weeks ago.
There are claims he was killed and dismembered inside the building by a 15-member Saudi “assassination squad”.
Saudi Arabia previously called the allegation “baseless”, but reports suggest they may acknowledge Mr Khashoggi was killed there.
Overnight, Turkish forensic teams searched the consulate building where the renowned journalist was last seen entering.
Turkish President Recep Tayyip Erdogan says the investigation in the Saudi consulate is looking into toxic materials.
Mr Erdogan added he hoped a reasonable view would be reached as soon as possible in the investigation.
US Secretary of State Mike Pompeo arrived in Riyadh this morning and has held talks with Saudi King Salman amid US media reports the kingdom may admit Mr Khashoggi died during a botched interrogation.
Mr Pompeo was to have have dinner with King Salman’s powerful son, Crown Prince Mohammed bin Salman, after meeting the king.