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

Mr. 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 Tayyip Erdogan had ordered preparations to be made.

“I will be heading an independent international inquiry into the killing of Saudi journalist Mr. Jamal Khashoggi, commencing with a visit to Turkey from 28 January to 3 February 2019,” Agnes Callamard, independent U.N. investigator, said in an email reply to Reuters in Geneva.