Confirming a report in Turkey's pro-government Sabah newspaper, the official said the chemist and toxicologist were tasked with erasing evidence before Turkish investigators were given access to the Saudi consulate and consul's residence.
The report said chemist Ahmed Abdulaziz Aljanobi and toxicologist Khaled Yahya Al Zahrani were a part of the 11-member Saudi team that arrived in Istanbul on October 11, according to "reliable sources".
Khashoggi was killed inside the kingdom's consulate in Istanbul by a team sent from Riyadh on 2 October, a murder Turkey's president said was ordered from "the highest levels" of Saudi Arabia's government.
"The Saudi government's long-standing repression of critics, exemplified by the extrajudicial execution of journalist Jamal Khashoggi last month, has until recently been willfully ignored by United Nations member states".
According to aljazeera.com, the officials said that Maher Mutreb, Salah Tubeigy and Thaar al-Harbi were the three key figures from the 15-member hit squad that were involved in dismembering Khashoggi's body and removing it from the premises.
It is the latest in a series of leaks from Turkish officials orchestrated to keep up the pressure on Saudi Arabia and ensuring that the killing is not covered up.
Turkey's chief prosecutor said last week that Khashoggi was strangled as soon as he entered the consulate and also confirmed the body was dismembered.
In his interview with Fox News, Prince Alwaleed denied reports that he had been tortured in custody and that officials stripped him of his wealth.
Two of the team of 11 investigators, which included chemistry and toxicology specialists, "came to Turkey for the sole goal of covering up evidence", said the official.More news: Arsenal progress under Unai Emery plain to see in draw with Liverpool
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Riyadh has blamed Khashoggi's death on a "rogue operation", and said the crown prince had no knowledge of the killing.
In an interview with CNN, Salah and Abdullah Khashoggi said they wanted to return the body to Saudi Arabia to bury it.
Saudi Arabia has released Prince Khaled bin Talal from detention as the kingdom faces global pressure over the murder of journalist Jamal Khashoggi.
Turkey has released a stream of evidence challenging the initial Saudi denials of involvement, and continues to press Riyadh for details.
Saudi Arabia insisted at the UN Monday that its investigation into the killing of journalist Jamal Khashoggi would be "fair", amid a barrage of criticism from countries over the brutal murder.
"The question now is who gave the orders".
The report also cited Turkish experts who suggested the claim that acid was used to eliminate Khashoggi's body or render it unidentifiable is likely. "All of these need to be looked at".
"We must reveal the identities of the puppet masters behind Khashoggi's killing", Erdogan said.