Diesel price crossed ₹100 a litre in Uttara Kannada on Saturday.
The price of diesel in Sirsi hovered between ₹100.06 and ₹100.12 a litre. While petrol in the town cost ₹109.64 a litre.
However, the price of diesel in Karwar stood at ₹99.79 a litre and the petrol cost was ₹109.30 a litre in the town.
Petroleum dealers said the diesel price was likely to cross ₹100 a litre in Karwar next week.
Increased transportation cost from Mangaluru to other places was adding to the increase in fuel prices, they said.