Petrol and diesel prices continued their upward movement on Monday. While petrol prices were hiked by 15 paise per litre in Delhi, Kolkata, Mumbai and Chennai, diesel prices were raised by 11-12 paise per litre. Monday's increase in petrol and diesel prices marked a fifteen straight day of hikes, which followed a 19-day hiatus ahead of Karnataka elections. Higher global crude oil prices, coupled with the bout of weakness in the rupee, are being attributed for the hike in domestic fuel prices.