Tehran: Tensions between Iran and the United States are rising sharply after Tehran warned that it could move to a fully offensive military position if diplomatic efforts fail to produce a lasting agreement. The warning comes as a temporary ceasefire arrangement has reached its deadline without a permanent settlement, while the strategically important Strait of Hormuz remains at the centre of the dispute.
Iran has been using the Strait of Hormuz as a major source of pressure in its confrontation with Washington. The waterway connects the Persian Gulf with the Gulf of Oman and is one of the world's most important routes for energy shipments. Any prolonged disruption could affect oil supplies, shipping costs and fuel prices across many countries.
The latest developments suggest that the diplomatic efforts which had offered some hope of reducing tensions are now facing serious difficulties. The United States has rejected an extension of the temporary ceasefire arrangement, while Iran has warned that its military posture could become more aggressive if negotiations fail.
The situation became even more complicated after Oman became involved in efforts to find a way to reopen the Strait of Hormuz. Iran and Oman have been discussing arrangements for commercial vessels to pass through the waterway, including possible routes that could allow shipping to resume. The discussions were seen as a possible opening for diplomacy, but they have also created a new disagreement with Washington.
US President Donald Trump has strongly criticised Oman's involvement and has threatened military action if Oman interferes with US efforts concerning Iran. Trump has also suggested that US control of the Strait could be considered, adding to concerns about a further escalation in the region.
Oman's position is particularly important because the country has traditionally maintained communication channels with both Iran and the United States. Its role as a mediator has made it one of the few countries capable of helping the two sides communicate when direct negotiations become difficult.
At the same time, the security situation around the Strait is becoming increasingly dangerous. A vessel was recently hit by an unidentified projectile in the Strait of Hormuz, damaging its engine room and leaving a crew member injured. The incident has increased fears among shipping companies and governments that commercial vessels could become caught in the conflict.
Several vessels have already been affected by the wider crisis, and shipping through the waterway remains severely disrupted. Tankers and other commercial ships have faced uncertainty over whether they can safely cross the Strait, while the threat of further attacks has increased insurance and transportation risks.
The crisis is also beginning to have a visible effect on global energy markets. Oil prices rose again on August 18 as traders reacted to the worsening US Iran confrontation and the possibility that oil shipments through the Strait could remain restricted. Brent crude moved above 91 dollars a barrel, its highest level since late July.
The rise in oil prices is important because prolonged disruption around the Strait could have consequences well beyond the Middle East. Higher crude prices can increase the cost of petrol, transport and other goods, placing additional pressure on households and businesses already dealing with high energy costs.
The current situation therefore involves more than a disagreement over Iran's nuclear programme. The future of the Strait of Hormuz has become one of the central issues in the negotiations between Tehran and Washington. Iran wants greater control over navigation through the waterway, while the United States is demanding the restoration of unrestricted commercial access.
Despite the increasingly harsh statements from both sides, diplomatic contacts have not completely stopped. Iran continues to communicate through intermediaries, while Oman is trying to find a practical arrangement that could allow shipping to resume. The difficulty is that neither Washington nor Tehran appears ready to accept the other's main demands.
For Iran, the threat of a fully offensive military posture is a warning that patience is running out. For the United States, maintaining pressure on Tehran and securing access through the Strait remain key objectives.
The next few days could therefore be critical. A new military incident involving a commercial vessel could quickly increase tensions, while a successful diplomatic arrangement could provide an opportunity to restore shipping and reopen wider negotiations.
For now, however, the Strait of Hormuz remains a major flashpoint. With Iran warning of further military action, Washington refusing to extend the temporary arrangement and Oman caught between the two sides, the possibility of a broader regional escalation is becoming increasingly difficult to ignore.