Kseniia Petrova’s future has hung in the balance since she allegedly failed to declare frog embryos that she was bringing back from France for research.

The youth chorus from Paris, whose members are between 11 and 13 years old, was performing as part of their US tour

The same day Harvard rejected the government’s demands, Trump officials moved to freeze $2.2 billion in research grants. Education Secretary Linda McMahon declared in May that Harvard would no longer be eligible for new grants, and weeks later the administration began canceling contracts with Harvard.

The children, who were between ages 11 and 13, were part of Chœur d’Enfants d’Île-de-France, a French choir group that was visiting St. Paul’s Parish in Harvard Square to perform a free concert, Boston.com reported. PEOPLE has reached out to St. Paul’s Parish for further information.

Lawyers for the Trump administration sparred with Harvard, Planned Parenthood and the American Association of University Professors on Monday at Boston's Moakley Courthouse over funding, free speech and more.

The Trump administration’s attack on Harvard University is an unprecedented campaign by the U.S. government against an institution of higher education.

The stakes for Harvard will be in focus on Monday, when a federal judge in Boston will hear arguments on whether the Trump administration illegally froze more than $2 billion in research funding