MANILA, Philippines (AP) — Former Philippine President Rodrigo Duterte was arrested by police at Manila’s international airport Tuesday on order of the International Criminal Court in connection with a case of crime against humanity filed against him, the Philippine government said.

Duterte was arrested after arriving from Hong Kong and police took him into custody on orders of the ICC, which has been investigating the massive killings that happened under the former president’s deadly crackdown against illegal drugs. President Ferdinand Marcos’ office said in a statement.

The ICC launched an investigation into drug killings under Duterte from Nov. 1, 2011, when he was still mayor of the southern city of Davao, to March 16, 2019, as possible crimes against humanity. Duterte withdrew the Philippines in 2019 from the Rome Statute in a move human rights activists say was aimed at escaping accountability over the killings.

The Duterte administration moved to suspend the global court’s investigation in late 2021 by arguing that Philippine authorities were already looking into the same allegations, arguing the ICC — a court of last resort — didn’t have jurisdiction.

Appeals judges at the ICC ruled in July 2023 the investigation could resume and rejected the Duterte administration’s objections. Based in The Hague, the Netherlands, the ICC can step in when countries are unwilling or unable to prosecute suspects in the most heinous international crimes, including genocide, war crimes and crimes against humanity.

President Ferdinand Marcos Jr., who succeeded Duterte in 2022 and became entangled in a bitter political dispute with the former president, has decided not to rejoin the global court. But the Marcos administration has said it would cooperate if the ICC asks international police to take Duterte into custody through a so-called Red Notice, a request for law enforcement agencies worldwide to locate and temporarily arrest a crime suspect.