French police have arrested a suspect in connection with the arson attack that gutted the historic town hall in Limoges during nationwide protests on Saturday, October 17, the Limoges prosecutor's office confirmed on Tuesday. Prosecutor Émilie Abrantes confirmed the arrest, and the man was placed in police custody for questioning, according to AFP and French media reports.

The suspect was detained early on Tuesday by officers from the RAID, the national police's elite tactical unit, in Val-d'Issoire in the Haute-Vienne department, near Limoges, according to the prosecutor's office and a source close to the case cited by AFP. Police sources described him as linked to ultra-left movements and said he was listed on France's S-file — the register of people considered a potential threat to national security — and was known to authorities for violence against public officials. Investigators have not publicly established that he set the fire, and he remains a suspect.

The town hall, inaugurated in 1883, was set alight after rioters forced their way in during a nationwide day of mobilisation against the high cost of living. Its interior was almost completely destroyed and its roof and bell tower collapsed, French media reported. Haute-Vienne prefect Maurice Barate described the destruction as a heritage catastrophe, and the burning of the 19th-century landmark has been compared in France to the shock of the 2019 Notre-Dame fire, which investigators believe was accidental.

The investigation was initially opened for destruction of property by dangerous means as part of an organised group. France's Anti-Terrorism Sub-Directorate (SDAT), which combats violent extremism, has also been seized of the case, AFP reported. Justice Minister Gérald Darmanin said the National Anti-Terrorism Prosecutor's Office was considering whether to take over the case and investigate it as a suspected terrorist act, and said the attack may have been an organised act — a characterisation investigators have not yet publicly established.

The arrest comes as French authorities brace for further protests planned for this weekend. Prime Minister Sébastien Lecornu has vowed a massive police presence during the next round of demonstrations, and curfews imposed after last weekend's disorder have been extended in parts of Paris, Lyon and Marseille, French media reported.

Sources: AFP, via the Limoges prosecutor's office and French media including BFMTV and FranceInfo (Oct 20, 2026); BBC News reporting on the Limoges arrest, via French media (Oct 21, 2026); Le Parisien, via police sources on the arrest (Oct 20, 2026).