Israeli media had earlier reported that Tel Aviv will provide gas to Lebanon from the offshore Leviathan field through Jordan under an agreement with the United States.
Lebanese leaders are wary of relying on Tehran to meet country's energy needs but have no other option.
The decision was made at an emergency meeting attended by the president, central bank governor and other officials over a fuel crisis that has paralysed basic services and triggered a scramble for fuel.
But the militant group's opponents have warned that the move can invite US sanctions on a country that's already reeling under an economic crisis.
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