President Donald Trump warned Iran not to "get cute" over activity at a suspected nuclear facility on Pickaxe Mountain, while U.S. and Iranian forces exchanged fire on ships near the Strait of Hormuz.

Rising stakes in a critical shipping lane

The two incidents occurred within hours of each other, prompting concerns that the already fragile Gulf security environment could deteriorate further. The Hormuz Strait, a chokepoint through which roughly a fifth of global oil shipments pass, saw a U.S. Navy destroyer fire on a vessel it said was Iranian‑linked, and minutes later an Iranian‑controlled speedboat launched a missile at a commercial tanker escorted by U.S. warships.

Both attacks were reported by the Pentagon and Iran’s Revolutionary Guard, each accusing the other of aggression. No casualties have been confirmed, but the incidents have already forced several shipping companies to reroute vessels around the Arabian Sea, adding days and costs to deliveries.

Trump’s direct appeal to Tehran

Speaking at a press briefing on Thursday, Trump said the United States would not tolerate any "cute" manoeuvres around the Pickaxe Mountain site, which U.S. intelligence believes could be part of Iran’s covert nuclear programme. "We are watching closely and we will act decisively if Tehran steps over the line," he added, echoing language used in earlier confrontations over Iran’s nuclear ambitions.

Iranian Foreign Ministry spokesperson Hassan Qashqavi dismissed the comment as "provocative rhetoric" and reiterated Tehran’s right to defend its sovereign territory. He also warned that any U.S. moves near the nuclear site would be met with "appropriate" retaliation.

Historical flashpoints and the risk of escalation

The Hormuz corridor has been a flashpoint since the 1980s, when Iran’s Revolutionary Guard seized the American frigate USS Thompson and later, in 2019, shot down a U.S. drone. Each episode has been followed by diplomatic flurries aimed at de‑escalation, but the pattern of tit‑for‑tat strikes has persisted.

Pickaxe Mountain, a remote region in southeastern Iran, entered international scrutiny after satellite imagery in early 2025 suggested the construction of underground shafts consistent with nuclear enrichment. The United States and European allies have repeatedly called for inspections, while Tehran has denied any illicit activity.

What comes next

U.S. Central Command has announced heightened naval patrols in the Gulf and warned that any further Iranian aggression could trigger a broader response, including the deployment of additional carrier strike groups. Meanwhile, the United Nations Security Council is set to convene an emergency session on Friday to discuss the incidents and explore diplomatic channels.

Analysts say the dual focus on a suspected nuclear site and a strategic maritime choke point underscores Tehran’s willingness to leverage multiple pressure points. If the rhetoric turns into sustained kinetic action, oil markets could feel the impact, with Brent crude already edging up 0.8 % in early trading.

For now, both sides appear to be testing each other’s resolve, leaving regional allies and global investors watching closely for the next move.