The government on Saturday increased the export duty, or windfall tax, on diesel to Rs 55.5 per litre and on aviation turbine fuel (ATF) to Rs 42 per litre.
According to a finance ministry notification, the revised duties would be applicable with immediate effect.
Earlier, the government, on March 26, imposed an export duty of Rs 21.50 a litre on diesel, and Rs 29.5 per litre on Aviation Turbine Fuel (ATF).
The duties were levied to increase domestic availability of the fuel amid the war in West Asia.
They were also aimed at not allowing exporters to take undue advantage due to price differences, as globally crude oil prices had risen since the beginning of the war.
On February 28, the United States and Israel launched military strikes against Iran, triggering sweeping retaliation from Tehran.
On April 8, Iran, the United States and Israel agreed on a two-week ceasefire in the war that tore across the Middle East and disrupted the global energy market.
Export duty on petrol continues to remain nil.
(With inputs from PTI)