How could a child without a parent or a ticket board a plane? Many of us may be wondering the same thing as the size of the Texarkana Regional Airport is smaller than other airports. According to a CNN report, Delta employees are asking the same question.

A 9-year-old boy walked aboard a Delta flight from Minneapolis-St Paul International Airport to Las Vegas with other passengers. Once the plane was in flight, flight personnel became curious about the boy as well as the adult he boarded with at check in.

After it was ascertained that the boy boarded without an adult, Child Protective Services was called. Delta is reviewing security tapes as well as other airport procedures to explain how he boarded without a parent or boarding pass.