Eldorado Gold is a gold producing and exploration company with gold assets in Brazil and Turkey.

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Eldorado Gold did not immediately respond to requests for comment or details about the raid.

NPR: Masked Intruders Raid Greek Gold Mining Company

The mining company, Hellas Gold, is 95 percent owned by Canadian mining company Eldorado Gold Inc.

NPR: Masked Intruders Raid Greek Gold Mining Company

Eldorado Gold Mines opened Port Radium in 1926 and accommodated the remoteness with the latest technology of the day.

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Eldorado Gold Corp shares are currently trading down about 8.2% on the day.

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ElDorado Gold Corp shares are currently trading down about 2.8% on the day.

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Eldorado Gold will release its earnings report Friday, Oct. 30.

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The nine stocks capped at 4.75% during the last index rebalancing were Kinross Gold ( KGC), Anglogold Ashanti ( AU), Gold Fields ( GFI), Polyus Gold (OPYGY), Eldorado Gold ( EGO), Randgold Resources ( GOLD), Osisko Mining ( OSKFF), Petropavlovsk and Centerra Gold.

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Eldorado boss Eduardo Moura said the Hellas Gold project would "generate approximately 5, 000 direct and indirect jobs in Greece".

BBC: Arsonists attack Hellas gold mine in northern Greece