ROMULUS, Mich. — The Federal Aviation Administration says it’s investigating after pieces believed to be from an aircraft were found in yards near Detroit Metro Airport.

It says a Spirit Airlines flight from Detroit to Atlanta returned to the airport after experiencing engine failure Monday evening. The flight was able to land without incident.

The FAA says pieces from the aircraft were thought to be contained to an airport runway but other material was found by nearby residents.

The FAA says it’s “interested in collecting these pieces so we can determine if they came from an aircraft, and if so, if they came from the same aircraft.”

FAA spokeswoman Elizabeth Isham Cory says the investigation could last several weeks.

An email requesting comment was sent to Miramar, Florida-based Spirit Airlines.