Anti-smuggling police seized a 2,000-year-old tombstone belonging to an ancient Armenian king in Turkey's northwestern Balıkesir province on Tuesday.

Acting upon a tipoff, security forces tracked two cars passing through Edremit town headed toward western Çanakkale province. After searching the cars, police found and confiscated a tombstone reading "the final resting place of the Commagene Kingdom's leader Antiacho" in Ancient Roman script. The smugglers were planning to sell the invaluable artifact for TL 2 million ($281,000), reports said.

Four suspects were detained during the operation and police launched an extensive investigation into the incident.

Thousands of anti-smuggling operations are carried out across Turkey every year to halt the illegal sale of historical objects and protect the country's rich cultural heritage. The issue is crucial to a country that is home to about 3,000 ancient cities from 42 civilizations and whose tourism industry relies on its rich historical heritage to attract millions of foreign visitors each year. Kingdom of Commagene, a Hellenistic era state located on southeastern part of Anatolia is one of those ancient civilizations which existed from 163 B.C. to 72 A.D. The famous Mount Nemrut that contains Commagene Kings' statues is inscribed on the UNESCO List of World Heritage.