Nasser Almarzooq told The Associated Press on Monday that he'd asked his uncle, Hussain Al Khawahir, to bring him a pressure cooker because the ones he bought in the U.S. didn't work.
Two pressure cookers were used in last month's Boston Marathon bombings.
Almarzooq says he's concerned about his uncle and hasn't been told anything since his Saturday arrest. Almarzooq goes to the University of Toledo and says his uncle was coming to visit him for a couple weeks.
Al Khawahir is accused of using a passport with a missing page and making false statements about why he was traveling with the pressure cooker.