The FBI has opened an investigation into how needles got into turkey sandwiches on four Delta Air Lines flights from Amsterdam to the U.S.
The airline said that what appear to be small sewing needles were discovered in six sandwiches on four planes that departed on Sunday.
One passenger on a flight to Minneapolis was injured, but refused medical attention, Delta spokeswoman Kristin Baur said.
The other needles were on two flights to Atlanta and one to Seattle.
The FBI has opened a criminal investigation into the matter, the agency said on Monday.
Ms Baur said the airline has boosted security for its meal production and is using more prepackaged food while the probe continues.
The sandwiches were made in the Amsterdam kitchen of catering company Gate Gourmet, and were to be served to business class passengers on Delta flights out of Schiphol Airport.
After the needles were found, passengers got pizza instead.
Gate Gourmet spokeswoman Christina Ulosevich said the company has gotten no reports of similar incidents on any of the other airlines it serves out of Amsterdam.
She said the company did not yet know how the needles got into the sandwiches.
Gate Gourmet issued a statement saying, ‘We take this matter very seriously, and we have launched our own full-scale investigation.’
It also said it was ‘heightening our already stringent safety and security procedures, to prevent any recurrence.’
But she declined to comment further, saying ‘details of this matter must remain confidential.’
Baur said security has been increased in its food preparation process, and it is using more prepackaged food.
In a statement to MailOnline, the airline said: ‘Delta is taking this matter extremely seriously and is cooperating with local and federal authorities who are investigating the incident.
The statement went on: ‘Delta has taken immediate action with our in-flight caterer at Amsterdam to ensure the safety and quality of the food we provide onboard our aircraft.
‘Delta requires all its in-flight caterers to adhere to strict criteria in order to offer our customers the very best onboard meals. The safety and security of our passengers and crew is Delta’s number one priority.’
The needle incident is the latest in a rash of troubles for the airline this month.
Last week, a ‘pressurization issue’ forced a jet travelling from Detroit to Washington, D.C., to declare an emergency.
The aircraft, carrying 152 passengers and six crewmembers, landed without incident and taxied to the gate. No injuries were reported.
On Thursday night, a Delta flight from New York to Madrid was turned around shortly after take-off when a federal air marshal found suspicious wires in a rear lavatory.
Although no explosives were found, officials discovered two pieces of a drinking straw about an inch and a half long with wires running through each.
The matter is under investigation.
Source: The Daily Mail