Libya rushed to beef up security at its oil fields and energy firms were considering similar measures in Egypt as Islamist militants threatened to attack new installations in north Africa.
More than 20 foreigners were still being held hostage or missing inside Algeria's In Amenas gas plant on Friday after Algerian forces stormed the desert complex near the Libyan border to free hundreds of captives taken by Islamist militants.
Hundreds of workers were evacuated from a number of Algerian production sites on the border with Libya to safer places in the country's center and industry experts said that could ultimately lead to lower oil and gas production from the OPEC member state.
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