Election officials say former Philippine President Rodrigo Duterte has been elected as mayor in his home city by a landslide, despite his detention by the International Criminal Court.

Former Philippine President Rodrigo Duterte was almost certain to be elected mayor of his home city by a landslide on Monday, unimpeded by his detention at the International Criminal Court on charges of murder as a crime against humanity.

Candidates linked to Philippine ex-leader Rodrigo Duterte appear to have won election victories, including Duterte himself, despite him being detained for alleged crimes against humanity.