Story highlights Port Authority says 11 people walked past security at JFK without being screened

TSA: Three people who set off metal detector in "possible security incident" were located

(CNN) A security incident Monday at New York's John F. Kennedy International Airport set off different explanations from federal and local authorities.

Eleven people went through an unattended Transportation Security Administration security checkpoint at the airport around 6 a.m. Monday, the Port Authority of New York and New Jersey said.

The TSA alerted the Port Authority about the lapse roughly two hours later, according to Joe Pentangelo, senior police public information officer at the Port Authority. By that time though, authorities could not find the 11 people as the "travelers in question boarded various flights," Pentangelo said in a statement.

Port Authority police identified three of the passengers who went through the unattended TSA PreCheck security checkpoint through video and sought to identify the remaining eight.

Meanwhile, the TSA called the incident a "possible security incident" and said it had affected just three passengers.