The Utility and Review Board has invoked its interrupter clause saying there will be a "significant" change to the price of diesel in Nova Scotia at midnight.

The board says the price of gas won't be affected.

It has given no indication on whether the price will go up or down. The interrupter clause was used last week to bring the price of gas down.

The interrupter clause is used by the Utility and Review Board to "respond to sudden and significant spikes, up or down, in petroleum product prices."

The Utility and Review Board considers using the interrupter clause for petroleum products when the market price for that product fluctuates by six to eight cents per litre versus the weekly price set by the board.

The price of diesel and gas typically changes on Friday in Nova Scotia.