A dead cockroach was found in a food packet served to a passenger by the Pakistan International Airlines (PIA) cabin crew.
According to a private news channel, the incident occurred in flight PK-711, which was going to New York from Manchester.
The passenger shouted when he saw the cockroach in the food and protested against the PIA services. The passenger also threatened to move US and British courts against the incident.
PIA spokesman has said the airline would conduct an investigation.