16:33, 27.Oct 2018
US President Donald Trump has called Saudi Arabia's response to the murder of the dissident journalist Jamal Khashoggi "the worst cover-up ever".
Those behind the killing in the Saudi consulate in Istanbul three weeks ago "should be in big trouble", he said.
Shortly afterwards, Secretary of State Mike Pompeo said the US would "punish those responsible" and had revoked visas of 21 identified suspects.
The Saudi government has blamed the murder on rogue agents.
But President Erdogan of Turkey has said the journalist was the victim of a carefully planned "political murder" by Saudi intelligence officers and other officials.
Speaking to reporters at the White House on Tuesday, Mr Trump said: "They had a very bad original concept, it was carried out poorly and the cover-up was the worst in the history of cover-ups."
"Whoever thought of that idea, I think is in big trouble. And they should be in big trouble."
The Saudi government has provided conflicting accounts of what happened to Khashoggi, a US resident and Washington Post contributor. After weeks of maintaining he was still alive, senior officials now say the 59-year-old was murdered in a rogue operation after visiting the Saudi consulate in Turkey.
The Hurriyet Daily news website said two suspicious suitcases containing clothes had been found in a Saudi consular car abandoned in a car-park in Istanbul.
What has Trump said?
Mr Trump's public criticism of Saudi Arabia on Tuesday was his strongest so far, but he has continued to highlight the kingdom's importance as a US ally.
In a separate interview with the Wall Street Journal, Mr Trump addressed the possible involvement of Saudi royals in the killing and said he did not believe King Salman had prior knowledge of the operation.
When asked about the possible role of Crown Prince Mohammed bin Salman, the president replied: "He's running things and so if anybody were going to be [informed], it would be him."
He said he had questioned the crown prince about Khashoggi's death, and been told he did not know about the operation when it was being planned.
Asked if he believed the royal family's denial, Mr Trump reportedly gave a long pause before saying: "I really want to believe them."
Mr Trump also said US intelligence officials were returning from Turkey and Saudi Arabia with information about the case.
CIA director Gina Haspel has been sent to Turkey. Intelligence officials have shared an audio recording from inside the Saudi consulate with her, Daily Sabah newspaper says. The reported recording is said to reveal gruesome details of the murder.
The US president appears to have changed his mind on the issue. When asked by a reporter in Arizona a few days ago whether he thought Saudi Arabia's explanation for Khashoggi's death was credible, he said: "I do."
What will the US do next?
Mr Pompeo said was looking into the possibility of imposing sanctions on those believed to be involved in Khashoggi's killing beyond revoking their visas.
"These penalties will not be the last word on this matter from the United States," he added.
Mr Pompeo said the suspects worked in the Saudi intelligence services, the foreign ministry and the royal court. But a state department official said they would not be named due to "visa confidentiality".
What is Turkey's stance?
On Tuesday, Turkey's president told MPs from his ruling party that the killing of Khashoggi was planned days in advance.
Mr Erdogan said Turkey had strong evidence the journalist was killed in a premeditated and "savage" murder at the Saudi consulate in Istanbul on 2 October.
He also called for the suspects to be tried in Istanbul.
Mr Erdogan's address coincided with the start of an investment conference in Saudi Arabia that has been overshadowed by the Khashoggi case. Dozens of government and business leaders have pulled out, but Crown Prince Mohammed bin Salman appeared at the event on Tuesday.
Many world leaders have condemned the murder of the prominent Saudi critic and demanded a full investigation.
Where do the Saudis stand?
King Salman chaired a cabinet meeting on Tuesday, after which a statement said Saudi Arabia would hold to account those responsible for the killing.
State media also said the king and the crown prince had held a meeting in Riyadh with members of the Khashoggi family, including Khashoggi's son, Salah. The Associated Press reported that Salah had been under a travel ban since last year because of his father's work.
What's at stake for relations between Saudi Arabia and Turkey?
Former Turkish opposition MP Aykan Erdemir told the BBC that Mr Erdogan has "much to extract" from Saudi Arabia.
"So far his strategy seems to be less about exposing what happened at the consulate in Istanbul and more about drip-feeding leaks to national and global media to put pressure on Riyadh to extract diplomatic and economic concessions."
Relations between the two countries have been strained since the so-called Arab Spring in 2011.
The Saudi monarchy was alarmed by the pro-democracy uprisings that swept across the region, but they were welcomed by the Turkish president.
Diplomatic ties between Istanbul and Riyadh further deteriorated after a crisis over Qatar erupted in 2017.
Saudi Arabia, the United Arab Emirates, Egypt and Bahrain severed all diplomatic and trade links with the tiny gas-rich state over its close ties to Iran and its alleged support for terrorist groups - a charge it denied.
Turkey responded by sending food by sea and air to prevent shortages in Qatar's supermarkets caused by the de facto blockade.
Mr Erdemir said President Erdogan might be looking for concessions from the Saudis on Qatar and "some financial payoffs, since Saudi Arabia has deep pockets".
What does Saudi Arabia say happened?
Saudi Arabia's account of Khashoggi's fate has not been consistent.
First it said Khashoggi had left the building alive, then that he had been killed in a "fist-fight" inside the consulate, before finally saying that Khashoggi had been murdered in a "rogue operation" that the leadership had not been aware of.
"The individuals who did this did this outside the scope of their authority," Foreign Minister Adel al-Jubeir told Fox News. "There obviously was a tremendous mistake made, and what compounded the mistake was the attempt to try to cover up."
He said that Saudi Arabia did not know where the body was.
An unnamed Saudi official told Reuters news agency on Sunday that Khashoggi had died in a chokehold after resisting attempts to return him to Saudi Arabia. His body was then rolled in a rug and given to a local "co-operator" to dispose of.
In addition to the arrests of 18 people, the Saudis say they have sacked two of the crown prince's aides and set up an organisation, under his leadership, to reform the intelligence agency over the killing.
According to Reuters news agency, quoting Turkish and Arabic intelligence sources, one of the sacked aides appeared via Skype during Khashoggi's questioning. Saud al-Qahtani was quoted as giving the instructions "bring me the head of the dog", after the two men traded insults.
The sources say President Erdogan has a copy of the Skype audio but is refusing to hand it over to the US.
Source : BBC