Natural gas output was 1.6pc lower at 2.64 billion cubic metres during the same period, the data showed.

Indian refiners processed 20.30 million tonnes of crude oil in June, the lowest since February.

Refinery output declined 7.1pc compared with the same period last year, the Ministry of Petroleum and Natural Gas said in the release, as many state refiners shut units for maintenance.

Among the key refineries affected by shutdowns in June were Reliance's 330,000 barrels-per-day (bpd) Jamnagar refinery and Indian Oil Corp's 120,000 bpd Barauni refinery.

Crude output in May had dipped about 7pc from a year earlier to about 2.80 million tonnes. Output has been declining month-on-month since December 2017.

Indian oil minister Dharmendra Pradhan said on July 16 the country had adequate oil supplies to compensate for lost imports from Iran.

India halted imports from Iran after the United States in May withdrew exemptions to import crude from Iran despite sanctions against the Middle East producer.