Authorities in the United States have reviewed airport security footage as they continue to investigate how a woman sneaked on board a Delta Air Lines flight from New York to Paris without a ticket last Tuesday –– one of the busiest travel days of the year.

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.

The same passenger who stowed away on a Delta Air Lines flight to Paris caused a disturbance on a flight to New York on Saturday, an aviation official said.