An unannounced trip by former Philippine President Rodrigo Duterte to Hong Kong has set off speculations that he may be trying to evade a possible arrest warrant by the International Criminal Court over his bloody crackdown on drugs.

Former President Rodrigo Duterte was arrested by the Philippine government on Tuesday after it said it received an International Criminal Court (ICC) warrant accusing him of crimes against humanity .

The International Criminal Court is investigating alleged crimes against humanity carried out by the former president as part of his deadly war on drugs.