The United Nations special rapporteur on extrajudicial, summary or arbitrary executions said Thursday she will travel to Turkey next week to head an "independent international inquiry" into the murder of Saudi journalist Jamal Khashoggi.

Khashoggi, a columnist for the Washington Post and a critic of Crown Prince Mohammed bin Salman, was killed and dismembered by Saudi agents at its consulate in Istanbul on Oct. 2, provoking an international outcry.

Earlier on Thursday, Turkish Foreign Minister Mevlut Cavusoglu said it was time for an international investigation and that President Recep Tayyip Erdogan had ordered preparations to be made.