A fragile ceasefire between the United States and Iran appeared under serious strain on Monday after the US seized an Iranian cargo ship attempting to breach its naval blockade, prompting Tehran to vow retaliation and put new peace talks in doubt.
Iranian Foreign Ministry spokesperson Esmaeil Baqaei said Washington had shown it was “not serious” about diplomacy, citing the ongoing blockade of Iranian ports and other alleged violations of the truce. He added that Tehran would not change its core demands and did not believe in deadlines or ultimatums.
The US military said it had fired on and disabled the engines of the Iranian-flagged cargo ship M/V Touska in the north Arabian Sea on Sunday after a six-hour standoff. Video released by US Central Command showed Marines rappelling from helicopters onto the vessel.
TRUMP: “Today, an Iranian-flagged cargo ship named TOUSKA, nearly 900 feet long and weighing almost as much as an aircraft carrier, tried to get past our Naval Blockade, and it did not go well for them. The U.S. Navy Guided Missile Destroyer USS SPRUANCE intercepted the TOUSKA in… pic.twitter.com/YD8nEsKkPa
— Breaking911 (@Breaking911) April 19, 2026
Iran described the action as “armed piracy” and said it was ready to confront US forces, though it noted the presence of crew members’ families on board had limited its response.
China expressed concern over the “forced interception” and urged all parties to abide by the ceasefire in a responsible manner.
The incident comes just days after weekend talks in Islamabad failed to produce a breakthrough. While a second round had been under discussion for later this week, Iranian officials now say no decision has been made, with the US blockade cited as a major obstacle.
US President Donald Trump has maintained that the naval blockade of Iranian ports will remain in place until a permanent deal is reached. He has also warned of further military action if Iran does not comply with his terms.
Pakistan, which hosted the first round of direct US-Iran talks and continues to act as mediator, has not issued a detailed comment on the latest developments. However, officials say back-channel contacts are ongoing.
The two-week ceasefire, announced last week after six weeks of intense fighting, is due to expire soon. The conflict has killed thousands, severely disrupted global energy markets, and pushed oil prices to volatile highs.
With tensions rising once again, the coming days will be critical in determining whether diplomacy can prevent a return to open conflict or if the fragile truce will collapse entirely.
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