The protest action, organised by the Citizen Go platform, involved driving a bus through the streets of the French capital. The bus was emblazoned with the message 'Stop attacks on Christians,' according to Le Parisien this week. The vehicle had Spanish registration plates.

The Paris Prosecutor's Office issued a statement about the incident, indicating that they decided to end the detention and close the case due to irregularities. Firstly, there was a delay in presenting them to a judicial police officer, and furthermore, the reasons for the arrests had not been sufficiently specified.

The message displayed on the bus was accompanied by the Olympic rings, over which a Christian cross was depicted, and, most notably, a photomontage showing Leonardo da Vinci's 'The Last Supper' alongside the controversial scene from the Games' ceremony, performed particularly by trans artists, which was interpreted by some as a parody of the former.

After the vehicle had been seen on several main avenues of Paris, the police intercepted it near the Arc de Triomphe. The driver, who underwent a police check and a brief interrogation, demonstrated that all the bus documentation was in order.

According to the Prosecutor's account, at the request of the police, six other people presented themselves, claiming to be members of Citizen Go and admitting responsibility for the politically charged messages. The six were taken to the police station and placed under arrest, Le Parisien reported.

In France, participating in an undeclared demonstration is punishable by a fine. More severe is organising a demonstration without informing the authorities, which theoretically risks a sentence of up to six months in prison and a fine of €7,500 ($8,183).

The scene supposedly parodying the Last Supper of Jesus Christ (artistic director Thomas Jolly has denied any such reference) has received criticism, but very moderate, from the French Episcopal Conference. The reproaches have been much more incisive from the far-right in France and abroad. There has also been a deluge of virulent attacks on social media against Jolly and several of the actors in the scene, including death threats that have prompted the Paris Prosecutor's Office to open a judicial investigation.