Gas businesses such as Petrolimex gas, SaigonPetro gas, Gia Dinh gas and Vinagas said that the increase is due to the $140 per tonne rise in the price of imported gas to $925 for December delivery.
Representatives of gas businesses said that the world price of gas suddenly rose due to speculation while the world price of oil did not go up sharply.
This is the fourth month in a row the domestic price of gas has gone up.
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