The provisional ceasefire between the United States and Iran, established on April 7, faced a near-total collapse on April 20, 2026, as the strategic Strait of Hormuz was once again closed to commercial traffic. The escalation followed the U.S. Navy’s seizure of an Iranian-flagged cargo vessel over the weekend, an action that Tehran characterized as a direct violation of the truce. Global energy markets responded with significant volatility, as Brent and West Texas Intermediate crude futures both jumped by more than 5% in a single session.
According to reports from the U.S. Central Command, a guided-missile destroyer fired on and seized the M/V Touska after the vessel allegedly attempted to evade a U.S.-led naval blockade. President Donald Trump confirmed the seizure on social media, stating that the ship was in U.S. custody. In a Monday interview with Bloomberg News, President Trump described a ceasefire extension as highly unlikely and maintained that the Strait of Hormuz would remain blockaded until a comprehensive agreement is reached. The current two-week truce is scheduled to expire on Wednesday evening, Washington time.
Tehran responded by rejecting a second round of peace negotiations that were slated to begin Tuesday in Islamabad, Pakistan. Iranian Foreign Ministry spokesman Esmaeil Baqaei stated on Monday that there were no plans for the next round of talks, citing Washington’s excessive demands and the ongoing naval blockade as primary obstacles. Iranian state media reported that the regime has hardened its stance, with officials indicating that the Strait of Hormuz—a conduit for approximately 20% of the world’s oil supply—will remain inaccessible to most vessels as long as the U.S. blockade of Iranian ports persists.
The impact on energy prices was immediate. Brent crude futures rose $5.08, or 5.62%, to settle at $95.46 per barrel. Simultaneously, U.S. West Texas Intermediate crude climbed $5.04, or 6.01%, to reach $88.89 per barrel. These price levels represent a sharp reversal from Friday’s session, when prices had declined on brief hopes that the waterway would reopen. Shipping analytics firm Kpler noted that while some vessels had successfully transited the strait over the weekend, the renewed closure has left thousands of seafarers and millions of barrels of oil stranded.
The conflict, now entering its eighth week since hostilities began on February 28, 2026, has created what is being described as a severe shock to global energy supplies. Beyond oil, European natural gas prices also saw an 11% increase on Monday. As the Wednesday deadline for the ceasefire expiration approaches, diplomatic mediators from Pakistan and Russia have urged both nations to return to the negotiating table to prevent a return to full-scale armed confrontation. However, the U.S. delegation, led by Vice President JD Vance, remained in a state of flux late Monday as Tehran’s participation remained unconfirmed.