Spanish firm Repsol has cancelled a contract to provide liquefied natural gas (LNG) to Argentina.
The move comes weeks after the Argentine government seized control of Repsol subsidiary YPF.
Repsol told news agency AFP that state-run Argentine energy firm Enarsa "has made a series of violations" and "is not respecting its terms".
Currently Argentina relies on LNG imports to meet 20-30% of domestic natural gas consumption.
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