"U.S. Marines have custody of the vessel," Trump said.
President Donald Trump announced "major combat operations" against Iran on Feb. 28, with massive joint U.S.-Israeli strikes targeting military and government sites.
After initial U.S.-Iran talks in Pakistan failed to reach a peace deal, Trump announced Sunday, April 19, that U.S. negotiators would head back to Islamabad Monday for a new round.
White House press secretary Karoline Leavitt said Vice President JD Vance would accompany special envoy Steve Witkoff and Jared Kushner, the president's son-in-law, to Islamabad for the talks.
Iran's continuing blockage of the Strait of Hormuz and their alleged refusal to abandon their nuclear program remain key sticking points in negotiations, according to Trump.
At least 35 people were killed and another 159 wounded in Lebanon on Tuesday, according to the Lebanese Ministry of Public Health.
The death toll in Lebanon now stands at 2,124, and 6,921 people have been injured since March 2, according to the ministry.
The Treasury Department confirmed Tuesday that it would not renew the short-term authorization license waiving U.S. sanctions on Iranian oil already at sea. The sanctions will go back into effect on Sunday at 12:01 a.m. ET.
In a post on social media, the Treasury Department said that it was "moving aggressively with Economic Fury" to apply pressure to Iran and put financial institutions "on notice" that the department is prepared to implement secondary sanctions against foreign financial institutions doing business with Iran.
The sanctions were temporarily lifted as part of the administration's larger effort to increase supply and help drive global oil prices down. The U.S. also provided a waiver for Russian oil at sea to be temporarily unsanctioned amid the war. That license expired on April 11.
-ABC News' Michelle Stoddart and Nicholas Kerr
As of Tuesday, 399 service members have been wounded in the war with Iran, according to a U.S. official.
The number has risen slightly since the ceasefire. That can be attributed to delayed reporting of traumatic brain injuries, as symptoms for those wounds can sometimes take a few days to manifest, according to the official.
Three service members are considered "seriously wounded," though it's unclear if those troops are the same who have been included in previous counts.
In total, 354 service members have been returned to duty.
-ABC News' Steven Beynon
Following the meeting with the Israeli and Lebanese ambassadors to the U.S., the State Department said there were "productive discussions on steps toward launching direct negotiations between Israel and Lebanon."
The department said that it seeks to lock the U.S. into a mediator role -- saying negotiations between the parties can't happen "through any separate track."
The parties agreed that direct talks would happen at a "mutually agreed time and venue," the department said, but gave no further details on when and where those talks might take place.
-ABC News' Shannon K. Kingston
