Investigation comes as Saudi efforts to normalise relations with west move on to Davos

A UN expert on executions is to travel to Turkey next week to lead an “independent international inquiry” into the death of Jamal Khashoggi, the Saudi Arabian journalist killed in the Saudi consulate in Istanbul in October.

Agnes Callamard, the special rapporteur on extrajudicial, summary or arbitrary executions, said she would evaluate the circumstances of the crime and “the nature and the extent of states’ and individuals’ responsibilities for the killing”. She will report on the findings from her five-day visit to the UN human rights council in June.