Two men were arrested in the central Greek city of Trikala on suspicion of trying to sell antiquities for €2.22 million (US$3.16 million), police said Saturday.

The Antiquities Trafficking division of the Thessaloniki police said in a statement they believe the two are part of a larger network trafficking in antiquities.

The pieces the two men were trying to sell included a tombstone with a bas-relief, a sculpture of a woman, a marble lion, all from the Hellenistic period — fourth to first centuries B.C. — and part of a Roman-era marble sculpture. Police also found two metal detectors, an ancient copper coin and several pictures of antiquities.

Police said the search is on for more antiquities traffickers.