Four masked men in black-and-white costumes slipped past customers and stole a Ronald McDonald statue from a McDonald’s restaurant in southern France.

Before making their escape Monday in a van with false license plates, the thieves scrawled an anti-McDonald’s message on the terrace of the fast food restaurant in Saint-Jean-de-Vedas, outside the Mediterranean city of Montpellier, police said Tuesday.

“Humanitarian intervention. Ronald McDonald rots away your guts and pollutes your head. React. Deliver the planet from this blight,” the thieves wrote.

Police were investigating.