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 Philippines President Rodrigo Duterte is now in the custody of the International Criminal Court (ICC) in the Netherlands following his dramatic arrest in Manila the day before over a brutal, years-long anti-drugs crackdown that left thousands of his citizens dead.