Union Finance Minister Pranab Mukherjee on Monday said the decision to increase petrol prices by Rs. 5 per litre was taken by the state run-oil marketing companies.

"The decision was taken in 2010. Petrol was deregulated, therefore it was for the petroleum companies to decide, oil markets and companies to decide at what point of time they will do so. When we deregulate it, then we shall have to leave it with the judgment of the oil marketing companies'' decisions," said Mukherjee.