Khashoggi, a 59-year-old Washington Post contributor, was killed after entering the Saudi consulate in Istanbul on October 2 to obtain paperwork ahead of his upcoming wedding.
"The victim Jamal Khashoggi's body was dismembered and destroyed following his death by suffocation, again in line with the advance plans", the two-page statement read.
Fidan pressured Saudi prosecutor Saud Al Mojeb Wednesday to reveal the location of Khashoggi's body, but said he has received no response.
But some Saudi experts dismissed widespread speculation that Prince Ahmed could pose a challenge to the authority of the crown prince, widely known as MBS.
"Given the information that high-level officials in Saudi Arabia were apparently involved, and it took place in the Consulate of Saudi Arabia, the bar must be set very high to ensure meaningful accountability and justice for such a shockingly brazen crime against a journalist and government critic", Bachelet pointed out.
The dissident reporter disappeared after going to the the diplomatic mission on October 2.
"I and my government would like all those responsible, from the person who gave this order to those who carried it out, to be brought to justice and punished under global law", she said. As a columnist for the Washington Post, Khashoggi had frequently criticized the Saudi government and Saudi Crown Prince Mohammed bin Salman.
"He has denounced the murder of Jamal Khashoggi and continues to believe that the United Kingdom must hold Saudi Arabia to account for this barbaric act", the source added.
Turkey's relations with Saudi Arabia were strained past year when Ankara sent troops to the Gulf state of Qatar in a show of support after its Gulf neighbours, including Saudi Arabia, imposed an embargo on Doha.
President Donald Trump has called the effort to hide Khashoggi's killing the "worst cover-up ever".
"He should not pave the way for a cover-up of my fiance's murder", she said.