Iran has announced the discovery of more than 212 billion cubic metres of natural gas reserves in the southern Fars province, in what officials are calling a landmark find for the country's battered energy sector. Petroleum Minister Mohsen Paknejad made the announcement on Sunday, stating that more than 160 billion cubic metres of the total reserves are recoverable.

Key Details of the Discovery

Paknejad, speaking to state television, described the newly found gas as 'sweet' natural gas — a designation indicating very low hydrogen sulphide content. This characteristic, he noted, is significant because it could substantially reduce both operating and development costs compared to sour gas fields.

The minister added that authorities were already taking urgent measures to begin developing the field 'as soon as possible,' signalling that Tehran intends to move quickly despite the pressures weighing on its energy infrastructure.

Iran's Energy Sector Under Strain

The announcement arrives at a particularly fraught moment for Iran's energy industry, which has been grappling with the cumulative impact of US-Israeli strikes on its infrastructure and an extensive regime of economic sanctions. Paknejad stated the discovery would 'serve as a very strong foundation for the country's energy future,' framing it as a strategic counterweight to external pressure.

This comes amid a sharp deterioration in the diplomatic climate between Tehran and Washington, with both sides trading escalatory signals in recent weeks.

Rezaei's Warning Over Economic War

In a social media post, Mohsen Rezaei, secretary of Iran's Supreme National Security Council, issued a stark warning in response to recent remarks by US President Donald Trump. 'If the economic war continues, not a single drop of oil will be exported, neither through the Strait of Hormuz nor from anywhere in the Persian Gulf,' Rezaei wrote, adding that Iran would 'regard any country's participation in or support for America's economic war against the Iranian people as an act of war.'

His remarks were a direct response to Trump's announcement on Truth Social on Wednesday, in which the US president described 'the most crushing economic operation ever taken' against any country providing support to Iran. Trump called the measure 'Economic Warfare and Isolation on an unprecedented scale,' labelling it 'an ECONOMIC D-DAY.'

Diplomatic Backdrop: MoU and Stalled Talks

The escalation follows a period of tentative diplomacy. On 18 June, the United States and Iran signed a memorandum of understanding (MoU) aimed at ending regional hostilities, including in Lebanon. Under the MoU, both sides were scheduled to conclude negotiations within 60 days — a window that closed on Monday — to reach a final agreement. The fate of those talks, however, remains unclear following last month's escalation between the two countries.

With the gas find now in play, Tehran appears to be signalling that it holds strategic energy leverage even as diplomatic channels remain uncertain. How quickly the field can be brought into production — and whether sanctions will impede that timeline — will be the defining question in the months ahead.