Cornel Feruta has been named as the acting Director General of the International Atomic Energy Agency (IAEA).
It comes after the death of Yukiya Amano earlier this week.
Members of the board held an extraordinary meeting on Thursday in which they decided to designate the Romanian official as acting director general.
During the meeting, all attendees stood a moment of silence as a respect gesture for the achievements of the late Japanese director.

India arrests Kashmir resident over deadly Delhi car blast
Netanyahu faces far-right backlash after US-backed statement on Palestinian state
Ukraine seeks exchange of 1,200 prisoners with Russia
Refugees in UK to face 20-year wait to settle permanently
Blast at police station in Indian Kashmir kills nine, injures 27