Egypt has not yet released another comment following Saudi Arabia's latest statement.
The admission - after persistent claims by the Saudi authorities that Khashoggi had left the consulate alive - came following the threat of U.S. sanctions.
The announcement marks the first time that Saudi officials have acknowledged that Jamal Kashoggi was killed inside the consulate in Turkey. She calls friends hours later to tell them that Khashoggi never emerged from the consulate.
Riyadh had denied for two weeks it had anything to do with the disappearance of Mr Khashoggi who was a fierce critic of the country and the crown prince Mohammed bin Salman.
"If the President will not stand up to Saudi Arabia, then we in Congress must stand strong for our nation, our values and journalists throughout the world", Costa said.
"His body, Saudi officials told several journalists, was handed over to a "local collaborator" for disposal", it said, while also criticizing Trump for allegedly trying to help top Saudi leaders escape "meaningful accountability".
October 4: Turkey summons the Saudi ambassador.
It also offered a far different version of events than those given by Turkish officials, who have said an "assassination squad" from the kingdom including an official from Prince Mohammed's entourage and an "autopsy expert" flew in ahead of time and laid in wait for Mr Khashoggi at the consulate.
The Gulf kingdom admitted last night that Khashoggi was killed at the consulate but said he had died after a fight broke out, claiming Salman had no knowledge of the alleged hit.
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Who are the men sacked by the Saudi government?
Celik said it was Turkey's "debt of honor" to reveal what happened.
Trump has sent mixed messages about Khashoggi for days, vowing a severe response but also saying that the United States wants to preserve its close relationship with the conservative kingdom.
The Saudi statement confirming the death of Khashoggi in a fist fight did not appear credible to some U.S. lawmakers, who demanded that Riyadh be held accountable for the incident.
October 16: Without warning, the Saudi consul in Istanbul, a key witness in the case, leaves Turkey to Saudi Arabia.
A joint Turkish-Saudi team completed an investigation into the case on Thursday after searching the residence of the consul general as well as the Saudi Consulate in Istanbul.
Saudi Arabia claims the suspects went to Istanbul to meet with Khashoggi over the possibility of him returning to the country.
"If the reports are proven to be what I hear in the paper, it is completely and uttlerly unacceptable and I would say the global community, our country included, has to take every possible action to ensure that those who are responsible, whoever they are, are brought to account".
The Ministry of Foreign Affairs said it was a resolution concerning the journalist's death and is an extension of the Kingdom's commitment to consolidating justice.