ORLANDO, Fla. – Questions linger Monday after a woman boarded a Delta flight at Orlando International Airport without a ticket and was removed from the plane.

The airline issued an apology Sunday, a day after the incident caused a three-hour delay.

Delta employees asked for the woman's ticket because she was in someone else's seat.

Orlando police Lt. Wanda Miglio said the woman claimed she threw her ticket away and didn't have identification.

The woman was escorted off the plane and got onto an elevator to catch a shuttle, police said.

Officials then rescreened all passengers.

It's not clear how the woman boarded the plane or if she faces any charges.

Delta said it's working with law enforcement agencies and the Transportation Security Administration on its investigation.

The TSA released a statement after the incident.

"The TSA can confirm that the individual was screened. We are working with law enforcement to investigate the incident at the plane and will not be providing any additional information at this time."

Watch News 6 and stay with ClickOrlando.com for updates.