The Philippine government on Thursday ordered law enforcement agencies to arrest Senator Ronald dela Rosa, who is wanted by the ICC over his role in former president Rodrigo Duterte's deadly "war on drugs" campaign.

Justice Secretary Fredderick Vida told reporters that Philippine law enforcement agencies "are now tasked to effect the arrest of Senator Ronald 'Bato' dela Rosa."

He is better known by his nickname "Bato," meaning "Rock."

The government order to enforce the warrant came after the Philippine Supreme Court on Wednesday rejected dela Rosa's bid for a temporary restraining order.

Vida said the former police chief was now considered a fugitive who should face charges before the International Criminal Court (ICC).