Two masked gunmen have stormed into a small museum at the birthplace of the ancient Olympics in southern Greece smashing display cases with hammers and making off with dozens of antiquities up to 3,200 years old.
It was the second major museum theft in as many months in debt-crippled Greece, and a culture ministry unionist said spending cuts have compromised security at hundreds of museums and ancient sites across the country.
The robbers targeted the museum of the ancient Games at Olympia, a few hundred yards away from the world heritage site's main museum that contains priceless statues and bronze artefacts excavated at the holiest sanctuary of ancient Greece.
Officials said 65 artefacts were stolen by the robbers, who tied up the only site guard, a 48-year-old woman.
Culture Minister Pavlos Geroulanos submitted his resignation after the morning robbery, but it was unclear whether it had been accepted by Prime Minister Lucas Papademos.
Geroulanos travelled to ancient Olympia, some 200 miles south-west of Athens.
"This is a very sad day ... a tragedy," ministry Secretary-General Lina Mendoni said.
Police in Olympia and neighbouring regions set up roadblocks for the thieves, who are believed to have escaped in a car driven by an accomplice, while a police helicopter combed the area and special investigators were rushed in from Athens.
"According to the results of the investigation so far, unknown persons, this morning, at about 07:34 am, immobilised the guard of the museum and removed bronze and clay objects from the displays, as well as a gold ring," a police statement said.
A culture ministry official said the stolen antiquities dated from the 9th to the 4th centuries BC, apart from the seal-ring which dates to Late Bronze Age Mycenaean times and was found in another part of southern Greece.
"They took small objects made of bronze and pottery - figurines, vases and lamps - and the ring," the official said. "The artefacts were behind reinforced glass panels which fracture like a car windscreen, and the thieves grabbed whatever small objects they could reach through the holes they opened."
A spokesman for museum guards urged emergency government action to protect historic sites and museums.
"The cutbacks imposed by the European Union and the International Monetary Fund have hurt our cultural heritage, which is also the world's heritage" said Yiannis Mavrikopoulos, head of the culture ministry museum and site guards' union.
"There are no funds for new guard hirings," he said. "There are 2,000 of us, and there should be 4,000, while many have been forced to take early retirement ahead of the new programme of layoffs. We face terrible staff shortages. As a result, our monuments and sites don't have optimum protection - even though guards are doing their very best to protect our heritage.
Officials said the robbers seemed to have poor information on the museum, asking the guard where they could get golden wreaths and a valuable stamp collection - which are not part of the display.
"They seem to have operated more as if they were carrying out a hold-up rather than a professional museum heist, the ministry official said.
The ancient Olympics were the most important sporting festival in ancient Greece, held every four years and lasting up to five days. They started in 776 BC and lasted until AD 394 when Roman emperor Theodosius abolished the festival, deeming it pagan.
The site hosted an Olympic event during the Athens 2004 Games, when the shot-put was held in the ancient stadium.
The flame for each modern Olympics is lit in a special ceremony at ancient Olympia - and the ceremony for the London Games will be held there on May 10.
Olympia Mayor Efthimios Kotzas urged authorities to improve security.
"The level of security is indeed lacking," Kotzas said.
"These are treasures. A piece of world heritage has been lost, thanks to these thieves. ... I think (authorities) should have been more mindful and the security should have been more serious."
In January, thieves made off with art works by 20th-century masters Pablo Picasso and Piet Mondrian from the National Gallery in one of the best-guarded areas of central Athens.
The burglars also took a pen and ink drawing of a religious scene by Italian 16th-century painter Guglielmo Caccia. As they fled, thieves abandoned a fourth work by Mondrian. No arrests have been made.