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
A tense Wembley play-off final between Reading and Huddersfield was settled on penalties.
Detectives want to find out what happened to this suitcase that Salman Abedi was seen carrying on the day of the attack.
The golf ace has been arrested for driving under the influence by police in Florida.