An unidentified person set fire to the altar tablecloth in the chapel near the cathedral entrance. At about 8:30 a.m. on March 19th, parishioners and a priest noticed flames and smoke coming from a chapel altar and immediately extinguished the fire. The priest then reviewed surveillance footage and observed a man entering the cathedral and setting fire to linens in a different part of the church, as well. The police were called and began an investigation, noting that there were signs of forced entry on several doors.
On Sunday, March 17th, the church of Saint-Sulpice in Paris had to be evacuated after a large fire broke out in the entryway. The large wooden door of the southern transept was engulfed in flames and severely damaged, as was the stained glass window above it. Firefighters were able to contain the blaze to prevent it from spreading to the rest of the church. On March 18th, investigators announced that the fire was not accidental in origin, but had been deliberately started.
Sometime during the night of March 16th to 17th, unknown vandals damaged the crucifix outside the church of the Sacred Heart of Jesus in Koszutka, a district of Katowice (Najświętszego Serca Pana Jezusa w Koszutce). Reports indicate that stones were likely thrown at the statue of Jesus, breaking the legs and arms.