HALIFAX -- Gas prices in Nova Scotia have taken a nine-cent tumble this week.

Prices fell six cents early Thursday when the Utility and Review Board used the so-called interrupter clause.

New prices typically come in effect on Fridays, but the interrupter allows the board to make unscheduled changes when there's a sudden market shift.

As of today, the price of regular self-serve is down another three cents.

It's now selling for about $1.34 in the Halifax area.