Petrol and diesel prices were increased for a ninth straight day in Delhi, Kolkata, Mumbai and Chennai, among other cities. These nine hikes come after a 19-day hiatus ahead of Karnataka elections, when prices were kept unchanged. Petrol prices have been increased by Rs. 2.24 per litre in Delhi, Rs. 2.21 per litre in Kolkata, Rs. 2.22 per litre in Mumbai and Rs. 2.36 per litre in Chennai during this 9-day period, data from Indian Oil Corporation showed. Diesel prices have been raised by Rs. 2.15 per litre, Rs. 2 per litre, Rs. 2.28 per litre and Rs. 2.31 per litre, respectively.