Iran has declared the Strait of Hormuz closed to all shipping, a move that immediately heightens risks for global energy supplies and maritime trade.
The declaration comes amid a sharp escalation in hostilities, with the United States launching a fresh wave of military strikes against Iranian targets in response to Tehran's actions.
The closure of the strait, which handles roughly a fifth of the world's oil consumption, represents a critical inflection point for shipping routes and freight markets.
Channel NewsAsia reports that the latest round of attacks followed Iran's Sunday announcement, signaling a breakdown in previous de-escalation efforts.
The conflict has now expanded beyond direct military exchanges to include active disruption of one of the world's most vital commercial waterways.
This development marks a significant deterioration from recent tensions, where ceasefire fraying and oil waiver disputes were the primary concerns.