(NEW YORK) -- American Airlines is investigating how and why a row of seats aboard one of its Boeing 757s came loose mid-flight this weekend, forcing an emergency landing in New York City, ABC News has confirmed.

The incident, which is also being investigated by the Federal Aviation Administration (FAA), happened on Saturday aboard a flight from Boston to Miami.

In a statement, the FAA said, "Preliminary information indicates that a row of three seats in the coach cabin apparently became loose."