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. The stowaway didn’t have a boarding pass but completed a security screening and bypassed two identity verification and boarding status stations to board a Delta aircraft, according to the Transportation Security Administration. The Tuesday incident happened on one of the busiest travel days of the year.

Nearly 2.7 million passengers traveled on airplanes that day, ahead of the Thanksgiving holiday, according to TSA data. Here’s what we know: ‘Exhaustive investigation’ underway The stowaway was not carrying any prohibited items, according to a TSA spokesperson.

It’s unclear how the individual was able to bypass boarding stations before getting on the plane. Delta is working with law enforcement and conducting an investigation of its own, the airline said. “Nothing is of greater importance than matters of safety and security,” a Delta spokesperson said in a statement.

“That’s why Delta is conducting an exhaustive investigation of what may have occurred and will work collaboratively with other aviation stakeholders and law enforcement to that end.” CNN has reached out to the FBI and Customs and Border Protection for more information. Stowaway is a US green card holder The stowaway is a woman between 55 and 60 years old and h.