LAGOS, June 17 (Reuters) - Gunmen overran a Nigerian oilfield station operated by Italy's Eni <ENI.MI> on Sunday, holding 12 workers hostage, company and security sources said. The militants invaded the Ogbainbiri flow station in Bayelsa state, which normally produces 40,000 barrels a day, after a gunfight with soldiers guarding the facility. The number of casualties was not immediately known.
