Brent crude futures rose 4.9% to $94.77 per barrel following US claim of seizing an Iranian cargo ship.
U.S. West Texas Intermediate jumped 5.8% to $87.33 per barrel as Iran closed the Strait of Hormuz to tanker traffic again.
The closure affects roughly 20% of global oil flow, prompting analysts to expect near‑term risk wobble and a US dollar rebound.
A two‑week US‑Iran ceasefire expires Tuesday, with US envoys headed to Pakistan and Tehran rejecting further talks while blockade remains.