Harvard researcher Kseniia Petrova, already facing possible deportation back to Russia, has now been charged with smuggling undeclared biological material into the U.S.

Kseniia Petrova, a Russian-born scientist and researcher at Harvard University, was charged on Wednesday with one criminal count of smuggling goods into the country. The criminal charge represents an escalation by the Trump administration in a case that has drawn international scrutiny from academics and scientists throughout the world.

A Harvard scientist detained in Louisiana over immigration concerns has now been charged with smuggling frog embryos and is being transferred to Massachusetts for trial.