Intensifying strikes on Russian energy infrastructure have triggered fuel restrictions across much of the country, with particularly severe curbs imposed in much of southern Russia and Siberia, as well as all of Russian-occupied Ukraine.Independent retailers approached the price threshold of 100 roubles per litre two weeks ago, but did not cross it because their software was not configured to advertise three-digit prices on display boards, the sources said.By the end of June, worsening market conditions drove these filling stations to make the technical updates to be able to offer gasoline and diesel at up to 120-140 roubles per litre, according to the sources.Prices at chain stations operated by vertically integrated oil companies are little different from pre-crisis levels: AI-92 costs about 63-66 roubles per litre, and AI-95 about 70-73 roubles per litre.