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.

Teacher dies after Thailand school shooting
Israel to join Trump's 'Board of Peace', Netanyahu says
Canadian police identify suspect in mass school shooting
US lets flights resume at El Paso airport after brief security halt
Ten dead after shooter opens fire at high school in Canada