*New pressure over journalist's death, Trump silent at deadline
President Donald Trump appeared prepared to ignore the US Congress's Friday deadline to determine who ordered the assassination of Jamal Khashoggi amid new revelations that Saudi Arabia's crown prince spoke of threatening the journalist with a "bullet."
With pressure mounting in Washington and Riyadh, the US president theoretically had until Friday to designate those responsible for the murder of Khashoggi, who was strangled and dismembered by Saudi agents in the kingdom's consulate in Istanbul on October 2.
The deadline was imposed by Democratic and Republican senators, who wrote the president on October 10 calling for an investigation into the apparent extra-judicial killing.
Under an existing human rights accountability law the letter gives the president 120 days to designate and punish those responsible.
But no definitive action was expected Friday from the administration.
The State Department said on Thursday that Washington had already taken action over Khashoggi's killing.
A department spokesman pointed to last year's revocation of visas for nearly two dozen Saudi officials and the freezing of assets of 17 others after Khashoggi's murder.
Some members of the US Congress have publicly stated that they suspect Crown Prince Mohamed bin Salman was directly responsible for the killing, based on the CIA's conclusions.
The murder was met with international outrage and considerably hurt the image of the crown prince.
In December, the Senate, controlled by Trump's Republican Party, unanimously adopted a resolution naming the crown prince "responsible" for the slaying.
The Trump administration claims it has no compelling evidence of the direct involvement of the young and powerful Saudi leader, although the senators — briefed by intelligence leaders behind closed doors — stressed they remained convinced that the prince known as "MBS" was responsible.
Meanwhile, the New York Times, citing officials who had seen US intelligence, said that Prince Mohamed had warned in an intercepted conversation to an aide in 2017 that he would go after Khashoggi "with a bullet" if he did not return to Saudi Arabia from the United States.
US intelligence understood that the ambitious 33-year-old heir apparent was ready to kill the journalist, although he may not have literally meant to shoot him, according to the newspaper.
Special UN rapporteur Agnes Callamard said on Thursday after a visit to Turkey that the killing of Khashoggi, who had written critical pieces on Saudi Arabia in The Washington Post, had been "planned and perpetrated" by Saudi officials.
Turkish Foreign Minister Mevlut Cavusoglu said Friday that a United Nations investigation into the killing of Khashoggi has to be launched.
Speaking to reporters in the southern province of Antalya, Cavusoglu said Turkey considered the findings of the UN-led inquiry into Khashoggi's murder important, but added that an official UN investigation was needed at this stage.