By Joel Guinto, Jonathan Head, South East Asia, BBC, Mar.11: Philippine police have arrested former president Rodrigo Duterte after the International Criminal Court (ICC) issued a warrant accusing him of crimes against humanity over his deadly "war on drugs".
The 79-year-old was taken into police custody shortly after his arrival at Manila airport from Hong Kong.
He has offered no apologies for his brutal anti-drugs crackdown, which saw thousands of people killed when he was president of the South East Asian nation from 2016 to 2022, and mayor of Davao city before that.
Upon his arrest, he questioned the basis for the warrant, asking: "What crime [have] I committed?"
Duterte's former presidential spokesperson Salvador Panelo has slammed the arrest, calling it "unlawful" as the Philippines had withdrawn from the ICC in 2019.
The ICC earlier said that it has jurisdiction in the Philippines over alleged crimes committed before the country withdrew as a member.
But activists called the arrest a "historic moment" for those who perished in his drug war and their families, the International Coalition for Human Rights in the Philippines said.
"The arc of the moral universe is long, but today, it has bent towards justice. Duterte's arrest is the beginning of accountability for the mass killings that defined his brutal rule," said ICHRP Chairperson Peter Murphy.
Duterte had been in Hong Kong to campaign for the upcoming May 12 mid-term elections, where he had planned to run for mayor of Davao.
Footage aired on local television showed him walking out of the airport using a cane. Authorities say he is in "good health" and is being cared for by government doctors.
"What is my sin? I did everything in my time for peace and a peaceful life for the Filipino people," he told a cheering crowd of Filipino expatriates before leaving Hong Kong.
A video posted by his daughter Veronica Duterte showed Duterte in custody in a lounge at Manila's Villamor Air Base. In it, he can be heard questioning the reason for his arrest.
"What is the law and what is the crime that I committed? I was brought here not of my own volition, it is somebody else's. You have to answer now for the deprivation of liberty."
The 'war on drugs'
Duterte served as mayor of Davao, a sprawling southern metropolis, for 22 years and has made it one of the country's safest from street crimes.
He parlayed Davao's peace-and-order reputation and cast himself as a tough-talking anti-establishment politician to win the 2016 elections by a landslide.
With fiery rhetoric, he rallied security forces to shoot drug suspects dead. More than 6,000 suspects were gunned down by police or unknown assailants during the campaign, but rights groups say the number could be higher.
A previous UN report found that most victims were young poor urban males and that police, who do not need search or arrest warrants to conduct house raids, systematically forced suspects to make self-incriminating statements or risk facing lethal force.
Critics said the campaign targeted street-level pushers from the urban poor and failed to catch big-time drug lords. Many families also claimed that the victims - their sons, brothers or husbands - were simply in the wrong place at the wrong time.
Investigations in parliament pointed to a shadowy "death squad" of bounty hunters targeting drug suspects. Duterte has denied the allegations of abuse.
"Do not question my policies because I offer no apologies, no excuses. I did what I had to do, and whether or not you believe it... I did it for my country," Duterte told a parliament investigation in October.
"I hate drugs, make no mistake about it."
The ICC first took note of the alleged abuses in 2016 and started its investigation in 2021. It covered cases from November 2011, when Duterte was mayor of Davao, to March 2019, before the Philippines withdrew from the ICC.
'Donald Trump of the East'
Duterte remains popular in the Philippines as he is the country's first leader from Mindanao, a region south of Manila, where many feel marginalised by the leaders in the capital.
He often speaks in Cebuano, the regional language, not Tagalog, which is more widely-spoken in Manila and northern regions.
His populist rhetoric and blunt statements earned him the moniker "Donald Trump of the East". He has called Russian President Vladimir Putin his "idol" and under his administration, the Philippines' pivoted their foreign policy to China away from the US, its long-standing ally.
His daughter and political heir, Sara Duterte, is the Philippines current vice-president and is tipped as a potential presidential candidate in 2028.
In recent months, the Duterte family's alliance with incumbent President Ferdinand Marcos unraveled spectacularly before the public view, soon after Marcos and Sara Duterte won the 2022 elections by a landslide.
Marcos initially refused to co-operate with the ICC investigation, but as his relationship with the Duterte family deteriorated, he changed his stance, and later indicated that the Philippines would co-operate.
It is not clear yet whether Marcos would go as far as extraditing the former president to stand trial in The Hague.
Additional reporting by Virma Simonette in Manila