Needles Found in Sandwiches on Delta Flights Needles found on 4 flights; 1 passenger injured By Rob Quinn, Newser Staff Posted Jul 16, 2012 11:13 PM CDT Updated Jul 17, 2012 12:01 AM CDT 14 comments Comments "Delta requires all its in-flight caterers to adhere to strict criteria in order to offer our customers the very best onboard meals," a spokesman said. (AP Photo/Carlos Osorio, File) (Newser) – Disturbing news for airline passengers: The FBI is investigating the discovery of sewing needles in four sandwiches on Delta Air Lines flights from Amsterdam to the US, reports CNN. The needles, which had been placed in turkey sandwiches destined for business class passengers, were found on four separate flights. Two were found by air marshals and two were found by passengers. One Minneapolis-bound passenger was injured by the needle but declined medical treatment after landing. The Transportation Security Administration notified all US carriers with flights from Amsterdam of the incidents. Gate Gourmet, which supplied the sandwiches in Amsterdam, says it is co-operating fully with investigators and is closely monitoring every aspect of its operation. "This is a terribly upsetting situation," a spokeswoman says. "First and foremost is the safety of the traveling public. There's nothing more important to us at all than the safety of the passengers and crews." Delta is now serving sealed, prepackaged meals instead of sandwiches on its flights from Amsterdam.