Gas prices in Massachusetts are continuing to

rise, jumping another four cents in the past week to an average of

$2.80 for a gallon of self-serve regular.

AAA Southern New England said Monday that gas prices have now

risen nine cents in the past month and 18 cents since the start of

the year.

The cost in Massachusetts is a nickel below the national

average, but 79 cents higher than at the same time last year. AAA's

latest survey found a low of $2.69 and a high of $2.97 for

self-serve regular.