Paintings by renowned artists Pierre-Auguste Renoir, Paul Cézanne and Henri Matisse were stolen from a museum in Parma, Italy, according to police reports.

The theft was carried out by four masked men who broke into the museum during the night, authorities said. Police have not disclosed additional details about the circumstances of the break-in or the security measures that were bypassed.

The stolen works represent pieces by three of the most celebrated artists in modern art history. Renoir and Cézanne were leading figures in the Impressionist and Post-Impressionist movements respectively, while Matisse was a key figure in Fauvism and modern art.

Police have not released information about the estimated value of the stolen paintings or provided descriptions of the specific works taken. An investigation into the theft is ongoing.