Explosions hit 3 gas pipelines in Iran, halt flow

TEHRAN, Iran The lines carry gas from Iran's gas refineries in the south to the country's northwest.

The report says Friday's explosions cut the gas flow through those lines but power plants switched to oil for electricity production.

Mehr says an investigation is under way as to what caused the blasts.

In February, officials said the blasts were not caused by technical failures but did not say if they were acts of sabotage.

Iran's oil and gas sector has been hit by an increasing number of attacks recently but authorities have provided no explanation for them.

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