A Delta Air Lines flight from Detroit to Amsterdam was diverted early Wednesday morning after passengers were served spoiled food.

Delta Flight 136 was diverted to New York’s JFK airport due to the issue, a Delta spokesperson confirmed.

Officials say part of the Main Cabin in-flight meal service was spoiled, and medical crews treated the affected passengers when they landed in New York at about 4 a.m.

There were 277 passengers on board, but Delta officials haven’t released a confirmed number of passengers who ate the spoiled food. A source with knowledge of the situation told CBS New York that 70 passengers became sick after consuming the meal.