President Donald Trump says the U.S. seized an Iranian-flagged cargo ship that tried to circumvent its naval blockade near the Strait of Hormuz. 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. Iran has not confirmed it will attend. Iran's military slammed Sunday's seizure and vowed a swift response. The interception was the first since the blockade of Iranian ports began last week. Trump said a U.S. Navy guided missile destroyer in the Gulf of Oman “stopped them right in their tracks by blowing a hole in the engineroom” and that U.S. Marines were seeing what is on board the vessel.