The US Department of Justice decided to stop prosecuting Russian scientist Ksenia Petrova. The agency asked the court to close the biologist's criminal case. TASS reports this with reference to the official court documents. Petrova was arrested at Boston Airport in February 2025 after clawed frog embryos were found in her luggage. The Russian woman was denied her visa, charged with smuggling biological materials and making false statements, and was then placed in an immigration prison, from where she was later released on bail.

The US Department of Justice decided to stop prosecuting Russian scientist Ksenia Petrova. The agency asked the court to close the biologist's criminal case. TASS reports this with reference to the official court documents. Petrova was arrested at Boston Airport in February 2025 after clawed frog embryos were found in her luggage. The Russian woman was denied her visa, charged with smuggling biological materials and making false statements, and was then placed in an immigration prison, from where she was later released on bail.