Linked ITAR-TASS source says that the rise in that week was just 0.05 roubles per liter with the price around 55 roubles. Not sure where the 10% figure comes from, either some other source was used, or it was not translated correctly (mistook “5 копеек” (.05 rub) for 5 roubles)

Weirdly enough, it’s exactly two months between the mutiny and his death. Interestingly enough, the invasion started on 24th as well. Weird.