Haiti’s assassinated President Jovenel Moise Credit: Dieu Nallo Chery/AP
Stephane Dujarric, spokesperson for the United Nations Secretary-General António Guterres, said the UN was "very concerned" about Haiti.
"What is important is that the international community rally around Haiti to support it in any way we can," Mr Dujarric said.
"For our part, we are calling for calm to ensure that there's no violence, for constitutional continuity - there is a constitution, it is very important that needs to be respected.
"Beyond the political, of course we condemn this abhorrent assassination of the president," he said.
Stephane Dujarric says Haiti is in a 'huge humanitarian crisis'