Official reason: market correction due to events in the Middle East.
Real reason: we are in a polling period.
Otherwise, why would the petroleum pricing control nazis have issued an "urgent" and "emergency" notice to drop prices less than 24 hours after saying they didn't have any plans to drop prices?
Of course, gas price "regulation" is a fraud anyway. But as much as "regulation" is a silly thing, government will keep it for just such a polling contingency.