What has the fallout been?

Saudi Arabia’s western allies reacted with caution to early reports of Khashoggi’s murder, but as more details were revealed about the gruesome nature of the killing, that caution turned to condemnation.

After first admitting that he was wary of risking more than $110bn arms deals with Riyadh, US President Donald Trump has since vowed “severe punishment” if the US determined the Saudi state was responsible, and called it “the worst in the history of cover-ups.”

US Secretary of State Mike Pompeo announced that the US would be revoking visas for some Saudi officials suspected of involvement in Khashoggi’s death, and lawmakers from both parties in Congress have expressed a desire to introduce sanctions against Saudi Arabia.

On Wednesday, Prime Minister Theresa May said the UK would also revoke visas for suspects in the case.

"We condemn the killing of the journalist Jamal Khashoggi in the strongest possible terms and after his disappearance we made clear that Saudi Arabia must cooperate with Turkey and conduct a full and credible investigation,” she told Parliament.

The developments also cast a huge shadow over a much anticipated investment conference, hosted by Crown Prince Salman. The US treasury secretary Steven Mnuchin and the UK international trade secretary Liam Fox had both been scheduled to attend the Future Investment Initiative conference in Riyadh, but pulled out at the last minute.

However, Germany is the only country to make a concrete move so far. Chancellor Angela Merkel announced over the weekend that Germany would freeze arms exports to Saudi Arabia until Riyadh came clean.

“As far as arms exports are concerned, they can not happen in the state we are in at the moment,” she said.