France’s interior minister on Saturday condemned threats made against Catholics taking part in a Marian procession in the western suburbs of Paris.

Gérald Darmanin deplored what he said were “unacceptable acts” during a torchlight procession in Nanterre on Dec. 8, the solemnity of the Immaculate Conception.

“Freedom of worship must be able to be exercised in all serenity in our country,” he wrote on his Twitter account on Dec. 11, expressing “support for Catholics in France.”

The French daily Le Figaro reported that on Wednesday evening around 30 Catholics were due to depart from the chapel of Saint-Joseph-des-Fontenelles on an annual procession to the parish of Sainte-Marie-des-Fontenelles, around half a mile away, along a route approved by the local authorities.