Finance Minister Shaukat Tarin has revealed that the federal govenmnet had to increase the prices of petroleum products because under one of the conditions set by the International Monetary Fund (IMF) it is required to pass on any hike in the prices to people. Speaking at a press conference in Washington, Tarin said the Oil and Gas Regulatory Authority (OGRA) had calculated that petrol price in the international market had gone up by Rs10 per litre.