SOFIA, July 10 (Reuters) - Bulgarian customs officers have seized more than 700 litres of concentrated cocaine worth an estimated 10 million euros ($13.94 million) found concealed in over 1,000 wine bottles, officials said on Friday.

The drugs, found hidden in a container which had been loaded in Bolivia and shipped via Chile, were seized in the Black Sea port of Varna in a joint operation with the U.S. Drug Enforcement Administration (DEA).

Customs officials said the cocaine was destined for Europe.

Officials said the operation was ongoing and would not say whether arrests had been made. (Reporting by Tsvetelia Ilieva; Editing by Sophie Hares)

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