Massachusetts motorists are getting more relief at the pump, as the cost of a gallon of gas has fallen 4 cents in the past week.

AAA Southern New England reports Monday that self-serve, regular has dropped to an average of $3.39 per gallon, a nickel higher than the national average.

Massachusetts prices are now 6 cents per gallon lower than a month ago and 14 cents lower than at this time last year.

AAA found self-serve, regular selling for as low as $3.21 per gallon and as high as $3.79.

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