The political leader of the Basque separatist group Eta has been arrested in the French Alps after 17 years on the run, officials say.
In a joint French-Spanish police operation, Josu Ternera - whose real name is José Antonio Urrutikoetxea - was arrested in Sallanches.
He is accused over several Eta killings.
Eta, which waged a violent campaign for Basque independence for more than 40 years, said in 2018 it was disbanding.
The group killed more than 800 people during its campaign of violence before declaring a ceasefire in 2011.
Reports say Ternera is seriously ill and Spanish police tipped off their French colleagues that he was on his way to hospital, triggering his arrest.
Spanish prosecutors allege that Josu Ternera was involved in a car bomb attack outside a Civil Guard barracks in the northern city of Zaragoza in December 1987, which killed 11 people, including five children.
From 1989 to 2000 he was held in French and Spanish jails. At the time of his disappearance in 2002, he was a free man – but failed to answer a court summons over the Zaragoza attack. He had not been seen since.
He is now expected to be imprisoned in France, because last June a French court sentenced him to eight years for leading a "terrorist" group.
But Spain is likely to request his extradition over the Zaragoza attack and alleged involvement in other crimes, including the 1980 murder of a Michelin manager, Luis María Hergueta.
- The Basque Country's population is about 2.2 million
- It has autonomous status within Spain, with its own president and parliament
- It is called Euskadi in Basque, an ancient tongue unrelated to other European languages
- Ethnic Basques also live in adjacent areas of Spain and France
Eta began its violent campaign in 1968, during the Franco military dictatorship, and is considered a terrorist organisation by the European Union.
Ternera is also on the US sanctions list, as a designated "terrorist".
In an audio announcement in May 2018, Ternera said Eta had "completely dismantled all of its structures" and would "no longer express political positions, promote initiatives or interact with other actors".
He said former members would "continue the struggle for a reunited, independent, socialist, Basque-speaking and non-patriarchal Basque Country".
Josu Ternera was elected to the Basque regional parliament, despite being prosecuted by the Spanish authorities.
Spain's Supreme Court had ordered him to appear before a judge in November 2002 but he never turned up. At that point an international arrest warrant was issued, and Interpol listed him among the most wanted fugitives.
His last public appearance was in October 2002, when he spoke to journalists with a Basque separatist ally, Arnaldo Otegi, at the UN building in Geneva, Spain's La Vanguardia daily reports.
Sources at Spain's interior ministry are quoted as saying Ternera has been living near Saint-Gervais-les-Bains, an Alpine village near Mont Blanc.