Robbery at Ancient Olympia museum
The robbers are said to have overpowered a female guard
Armed robbers have stolen dozens of artefacts from a museum in Ancient Olympia - the birthplace of the Olympics, Greek officials say.
Local mayor Thymios Kotzias told media two masked men had broken into the museum after overpowering the sole guard, a woman.
He said items of "incalculable" value had been stolen, but gave no details.
Culture Minister Pavlos Geroulanos has tendered his resignation, state television reported.
Officials say the thieves broke into the museum early on Friday, smashed glass displays and took about 60 items - mostly bronze and clay statuettes.
Ancient Olympia, in Western Greece, is regarded as one of the most important cultural sites in the country.
Mr Kotzias was quoted by AFP as saying: "There were two of them, and they had a gun.
"They immobilised the guard as the shift changed at 7am (0500 GMT), having previously knocked out the alarm.
"We must wait and see what the local archaeology supervisor will say, but the items were of incalculable value," Mr Kotzias added.
Culture minister Pavlos Geroulanos, pictured from file, has resigned over the robbery
Armed robbers stole around 60 valuable statuettes from a museum in , Greece this morning. A state television channel reported that the Greek culture minister  tendered his resignation upon hearing of the robbery.

"We must wait and see what the local archaeology supervisor will say, but the items were of incalculable value," local mayor Thymios Kotzias said. The value of the articles hasn't been calculated yet.

The masked robbers initially demanded a female employee to hand over the articles. When she refused, they tied her up and snatched the articles through the glass planes themselves.

This is the second major robbery in the country recently. Paintings by ,  and others were stolen from   in January. Olympia is the place where the first Olympic Games were held.