The incident allegedly took place during a stop by the procession at a public health centre in the town, Frosinone, when the youths allegedly hurled blasphemous slurs at a priest blessing sick people.

They are being sought under Article 724 of Italy's criminal code which punishes "anyone who publicly blasphemes, with invective or offensive words, against the Divinity and anyone who carries out any blasphemous public action against the dead".

ANSA