Trump says Marines have seized an Iranian-flagged cargo ship that tried to evade blockade after Navy blew a ‘hole in the engineroom’

President Donald Trump said the U.S. forcibly seized an Iranian-flagged cargo ship that tried to get around a naval blockade near the Strait of Hormuz on Sunday, the first such interception since the blockade of Iranian ports began last week.

Trump on social media said the ship was warned by a U.S. Navy guided missile destroyer in the Gulf of Oman to stop, but it did not. He said the Navy “stopped them right in their tracks by blowing a hole in the engineroom” and that U.S. Marines had custody of the vessel, named Touska, and were “seeing what’s on board!”

There was no immediate Iran comment. The news threw into question Trump’s earlier announcement that U.S. negotiators would head to Pakistan on Monday for another round of talks with Iran.

That had raised hopes of extending a fragile ceasefire set to expire by Wednesday, even as Washington and Tehran remain in a standoff over the Strait of Hormuz.

Iran has not confirmed it would attend. While its chief negotiator, parliament speaker Mohammed Bagher Qalibaf, said in an interview aired on state television late Saturday that “there will be no retreat in the field of diplomacy,” he acknowledged a wide gap remained bet...