A woman who snuck past security checkpoints and made her way onto a Delta Air Lines flight from New York to Paris remains in France.

Last week, a woman managed to sneak onto the Delta flight and get to Paris. She had been held in Charles de Gaulle airport until Saturday.

French officials tell ABC News that the woman who allegedly snuck onto a Delta Airlines international flight is a Russian national who did not have valid travel documents to enter the country.

Delta Air Lines recently witnessed a stowaway situation on their flight from New York to Paris. The incident took place last week when a woman flew to France without a ticket while spending most of the traveling time in the washroom. When she was set to return to the US, she caused a disturbance at the airport.

Investigators are trying to determine how a woman got past multiple security checkpoints this week at New York’s JFK International Airport and boarded a plane to Paris, apparently hiding in the aircraft’s bathrooms during the flight.

A passenger went through security screening but avoided identity and boarding pass checks before flying out of the United States, a T.S.A. representative said.

The woman boarded Delta Flight No. 264 from John F. Kennedy International Airport to Paris Charles de Gaulle Airport, CBS News learned. She was discovered while the plane was in midair and was taken into custody in Paris.