Sewing needles were found in at least five turkey sandwiches, according to the Associated Press.
Delta spokeswoman Kristin Baur said that the airline immediately stopped serving the sandwiches when the problem came to light, and messages were sent out to other flights from Amsterdam.
Passengers were reportedly served pizza instead and the airline is serving more pre-packed food until the situation is resolved.
More top news
"I really think that the focus of your outrage should be people who throw gay men off cliffs", said London Mayor, Boris Johnson.
Archaeologists have discovered eight mass graves holding more than 200 bodies between them hidden beneath a supermarket in Paris.
A serious case review into the exploitation of young people in Oxford has documented a catalogue of failures by police and social services.