Police on Tuesday said 42-year-old Leslaw Mastej and 49-year-old Jaroslaw Nowak died in Saturday's crash on Interstate 95 in Attleboro.
Nine other occupants of the van, including the driver, were injured. They were from Poland, New York, Philadelphia and New Jersey.
The van was operated by a tour group that caters to Polish and Polish-American communities. Police think the tour picked up passengers in Philadelphia, New Jersey, and New York City to visit scenic areas of Massachusetts.
The crash occurred when the van made contact with a Toyota SUV driven by a Rhode Island woman, who was also hurt.
The crash remains under investigation.
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