ISLAMABAD – The Oil and Gas Regulatory Authority (OGRA) forwarded a summary to the power division suggesting an increase in various petroleum products effective from June 1. The summary sent on Wednesday recommended hike of Rs8.37 per litre in petrol prices, while an increase of Rs12.5 per litre in diesel prices is recommended to the Pakistan Muslim league Nawaz-led federal government. The authority also recommended an increase of Rs8.30 and Rs11.65 in kerosene oil and diesel oil, respectively.