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Harvard researcher charged with smuggling frog embryos is being released from federal custody

  • Kseniia Petrova, a 30-year-old Russian-born Harvard researcher, was released on bail Thursday after nearly four months in federal custody on a smuggling charge in Massachusetts.
  • She was arrested on February 16 at Boston Logan International Airport after Customs officials detained her for carrying undeclared frog embryo samples obtained in France.
  • A federal judge ruled the immigration officers acted unlawfully, found the embryos nonhazardous, and approved her release on conditions that include travel limits and retaining her passport.
  • Petrova has stated she did not know the items required declaration and was not attempting to smuggle, while her attorney said she is grateful to be free and weighing her options.
  • Petrova is scheduled to appear in court next week for a hearing to determine probable cause regarding the smuggling allegation, and multiple countries have expressed enthusiasm about supporting her research endeavors.
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On Thursday, Russian scientist Kseniia Petrova, a Harvard University researcher, was released on bail by Judge Judith Dein in Boston, after facing charges for smuggling frog embryos into the United States, according to the Massachusetts District Attorney's Office.

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NBC Boston broke the news in Boston, United States on Thursday, June 12, 2025.
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