Federal and international authorities are investigating the discovery of needles in turkey sandwiches on Delta Air Lines flights from Amsterdam to the United States.
Dutch authorities -- military police and a team of special detectives and prosecutors -- are working working closely with their American counterparts to investigate the incidents, Robert Van Kapel, Marechaussee Police Department spokesman, told NBC News.
He added that it appeared the needles were deliberately placed in the sandwiches, but had no further information on the matter.
Delta says what appear to be sewing needles were found in five sandwiches Sunday. One passenger on a flight to Minneapolis was injured.
The other needles were on two flights to Atlanta and one to Seattle.
The needles were found in sandwiches made by the airline's Amsterdam caterer, Gate Gourmet, Delta spokeswoman Chris Kelly said Monday.
"Delta is taking this matter extremely seriously and is cooperating with local and federal authorities who are investigating the incident," the airline said in a statement.
"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," the statement said.
FBI Special Agent Stephen Emmett in Atlanta confirmed Tuesday that the agency is investigating but declined to comment further.
The Transportation Security Administration says it's closely monitoring the situation. The agency said it immediately notified U.S. carriers with flights from Amsterdam's Schiphol Airport.
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