French authorities on Monday, November 13, detained eight minors over anti-Semitic chants on the Paris metro that were filmed and widely shared on social media, prosecutors said. The chanting by the youths, which took place on October 31, sparked new concern about an upsurge in anti-Semitism in France amid the war between Israel and Palestinian militant group Hamas.

The eight, none of whom live in Paris, are being interrogated by transport police, a source close to Paris prosecutors, who asked not to be named, told Agence France-Presse. The chanting took place on the widely-used line 3 that runs through the heart of the French capital. The precise ages of the eight were not immediately clear.

Over 1,250 anti-Semitic attacks have been recorded in France, according to authorities, since the start of the war sparked by the October 7 attack by Hamas on Israel. Over 180,000 people turned out across France on Sunday according to police figures, 105,000 of them in Paris, to join marches "for the republic and against anti-Semitism."