New Delhi, May 25 -- Daily losses of India's state-run oil marketing companies on the sale of petrol, diesel and liquefied petroleum gas (LPG) have narrowed to about Rs.600 crore from nearly Rs.1,000 crore before retail fuel prices were first raised on 15 May, a senior petroleum ministry official said on Monday.

The comments came on a day global crude prices eased on hopes of a US-Iran peace deal, and after Indian Oil Corp. Ltd, Bharat Petroleum Corp. Ltd and Hindustan Petroleum Corp. Ltd raised petrol and diesel prices for the fourth time in 11 days, taking cumulative increases to around Rs.7.5 per litre.

With Monday's hike of Rs.2.61 per litre, petrol prices crossed the Rs.100-per-litre mark in the national capital to retail at Rs.102...