A United flight arriving at Newark Liberty International Airport had to be taken out of service after ants from a carry-on bag appeared in part of the cabin.

A passenger on the Venice-to-Newark flight Monday described the scenario in a series of tweets and photos.

On the plane from Venice to New York when a large, fat ant walks over my pillow. Hmmm. That's odd. — charlotte burns (@charlieburns) June 17, 2019

A United spokesman said the plane was sidelined once it reached Newark so it could be cleaned and exterminated.

The spokesman said the airline notified airport customs and agriculture personnel.