The two individuals are among 17 American passengers evacuated from MV Hondius.
President Donald Trump said that Polish President Karol Nawrocki had asked for U.S. help during their talks last year.
He has been sentenced to 12 years and 7 months in prison.
Six bodies were found on Sunday in a train boxcar in Laredo, Texas, according to police.

The postal service suffered a net loss of $9 billion last year.
The Teacher Freedom Alliance says more than 272,000 teachers have opted out of union membership.
Terrorists and a priest convicted of sexually assaulting a child are also on the Justice Department’s list.
Celebrations include a large-scale Mall festival, a tall ship gathering, and programs across multiple states.

The lawsuit raises issue with a state law and a city ordinance designed to limit local cooperation with federal immigration enforcement activities.
A Faint Meow in the Rubble of a Mississippi Tornado Leads to a Stunning Rescue.
The operation marked the latest U.S. military strike targeting suspected narcotics trafficking routes in the Eastern Pacific.
The state argues that the high court’s recent ruling on race and redistricting required it to adjust its electoral map.
Under the proposed legislation, any land purchase by a foreign adversary near a sensitive U.S. site is a national security threat.
The ceasefire will start May 9 and last until May 11, the president said.
Long-discussed files including footage of unidentified flying objects and flying discs, documented between June 1947 and July 1968, were released on May 8.
Shut out of the U.S. market, Chinese automakers are investing in Mexico, exploring Canada and designing EVs that match North American consumer preferences.
The court found that the tariffs were not allowed under a 1974 trade law.
Cameras and reporters were not allowed in the Oval Office during the meeting between the two leaders.
The seizures come as U.S. forces intensify strikes against narco-trafficking vessels linked to designated terrorist organizations overseas.
The new strategy document lists cartels and violent left-wing groups, alongside Islamic extremists, as the three major terror threat categories.
U.S. Department of Justice files second lawsuit over gun laws in Colorado, saying the bans violate the Second Amendment.