Members of the police and MİT will reportedly jointly analyze surveillance videos of the consulate's entrance and exits as well as the airports in Istanbul and gather any information that might help the case.
Saudi Crown Prince Mohammed bin Salman said last week that Riyadh was "ready to welcome the Turkish government to go and search our premises", because it had "nothing to hide" about the missing journalist, 59-year-old Jamal Khashoggi.
"God willing we will not be faced with a situation we do not want", the president told reporters in Ankara, adding: "I still am hopeful".
"I have raised Jamal's disappearance personally with the Saudi ambassador, and while we await more information, know we will respond accordingly to any state that targets journalists overseas", Corker wrote on Twitter.
"We demand from the global community to pressure Saudi Arabia and Mohammed bin Salman to tell us exactly what happened", said Mohamed Okad, a friend of Khashoggi and founder of Insight into Crisis, a conflict advisory group.
A Saudi Arabian journalist was murdered in an assassination operation at the country's Istanbul consulate, investigators believe.
Two senior senators of Trump's Republican party warned on Monday the US-Saudi relationship could be imperiled if the stories about Khashoggi are correct.
Reuters journalists toured the six-storey consulate in northern Istanbul which Khashoggi entered on Tuesday to get documents for his forthcoming marriage.
Media reports say two airplanes carrying 15 Saudi nationals arrived in Istanbul around the same time of Khashoggi's disappearance, fueling rumors that they were sent to dispose of the body.
"The delegation is there to assist in the investigations regarding the disappearance of the Saudi citizen Jamal Khashoggi".
Saudi Consul-General Mohammad al-Otaibi said that the consulate's own security cameras showed only a live stream and did not record footage, so they could not provide evidence of Khashoggi's movements.
Palestinian gunman kills two Israelis in West Bank: Israeli military
Israeli media reported that those killed were found shot to death on their office floor with their hands bound. He held a valid work permit and had been absent from work in the days leading up to the attack, the army said.
Authorities in Istanbul believe he was murdered within the consulate walls, but the Saudi government maintains he left.
The Turkish source said Turkish officials were trying to identify them.
He returned full-time to Saudi Arabia in the 1990s and in 1999 became the deputy editor of the English-language Arab News newspaper.
She said Mr Khashoggi was required to surrender his mobile phone, which is standard practice in some diplomatic missions.
According to Bloomberg, "Trump has heaped particular pressure on Saudi Arabia, the world's top exporter of crude oil, to do more to ease prices, by linking the American military presence in the Persian Gulf to the kingdom's oil-production policy".
Turkish officials have said authorities believe Khashoggi was killed at the consulate, allegations denied by Saudi Arabia.
As a contributor to the Post, Khashoggi has written extensively about Saudi Arabia, including criticising its war in Yemen, its recent diplomatic spat with Canada and its arrest of women's rights activists after the lifting of a ban on women driving.
Khashoggi left Saudi Arabia past year, saying he feared retribution for his criticism of Saudi policy in the Yemen war and its crackdown on dissent.
Saudi officials insist Khashoggi left shortly after he entered but his fiancee, Hatice Cengiz, who was waiting outside, says he never came out.
Khashoggi has been in self-imposed exile for the past year.
MBS, as the crown prince is known, has been trying to bring Saudi Arabia into the 21st century.