A delegation from Saudi Arabia has arrived in Turkey as part of a joint investigation into the disappearance of prominent Saudi journalist Jamal Khashoggi, two Turkish sources said on Friday.
"We need to know exactly what has happened and we need to know exactly who is responsible and, of course, when we see the multiplication of this kind of situation I think we need to find ways in which accountability is also demanded".
"A lot of people are looking to find out because it is potentially a really, really awful situation", the president added with reference to the journalist's possible murder.
"We would be very upset and angry if that were the case", Trump added.
A group of USA senators on Wednesday pressured Trump to hold Saudi Arabia, a longtime US ally in the Middle East, accountable for Khashoggi's fate, possibly calling for sanctions against the kingdom if it finds human rights violations under terms of the Global Magnitsky Act of 2016.
Riyadh has made little comment since Khashoggi vanished on October 2 after entering the Saudi consulate in Istanbul, triggering unconfirmed allegations that he was killed. Whatever took place, Corker said, "there was Saudi involvement" and "everything points to them".
Trump, in excerpts released Saturday from an interview to be aired Sunday on CBS's 60 Minutes show, warned there would be "severe punishment" for Saudi Arabia if it is determined that Khashoggi was murdered inside the Saudi consulate.More news: Tom Brady sends warning to National Football League after Patriots end Chiefs unbeaten start
Turkish officials had previously said the Saudis were resisting a search of the consulate after learning that police meant to use Luminol, a forensic chemical which reveals bloodstains, even if they had been wiped clean.
Trump told reporters he had talked with officials in Saudi Arabia "at the highest level" about Khashoggi's disappearance, but offered no indication on his whereabouts.
The heartfelt article, which described how the pair met at a conference in Istanbul in May and bonded over their "shared passion for democracy, human rights and freedom of expression" was published on Khashoggi's birthday, Cengiz said.
The controversy has also embarrassed Saudi Arabia's other traditional Western allies - many of them arms suppliers to the kingdom - and undermined efforts by the prince, Mohammed, to present himself as the modernising future of the kingdom.
Saudi Arabia, where Trump past year announced a $110 billion arms package, has been a centerpiece of his overhaul of weapons export policy in which he has gone further than any of his predecessors in acting as a weapons salesman.
Saudi state news agency SPA later quoted a Saudi official as welcoming Turkey's approval of its request to form the team.
Saudi Arabia appears to be increasingly cornered.More news: Here's what Elizabeth Warren's DNA test shows
Analysts say that Turkey is hoping to find support from its North Atlantic Treaty Organisation ally the United States in the case, although Ankara-Washington have been in crisis over the detention for the last two years of a Protestant pastor.
The delegation, which came on Thursday, is meeting a Turkish prosecutor investigating the case as well as representatives from the Justice Ministry, Interior Ministry, police and the national intelligence agency, another source said. "He said it very strongly", Trump said. Media reports say the men were in the consulate when Khashoggi was there.
Turkey believes the journalist was deliberately killed in the consulate and his body removed, but Saudi rejects those claims. "The idea that we can treat Saudi as a normal state if it practises state-sponsored murder outside its borders is simply not true".
UK Foreign Secretary Jeremy Hunt said that whatever happened now was "absolutely up to Saudi Arabia".
Paul also cited Saudi Arabia's intervention in neighboring Yemen's civil war.More news: Suspended finance chief of Patisserie Valerie arrested on suspicion of fraud