The Independent reported Monday that the unnamed passenger died from a seizure, causing the Aer Lingus flight to head to Cork Airport on Sunday.

The publication spoke with John Leonard, a passenger on the flight. “Horrible. I would say a very violent end – to die that way in the back of an aeroplane, it’s not right. It was not very pleasant at all,” he said.

A passenger was reportedly bitten after trying to restrain the unruly traveller.

“After that it got worse I would say, his seizure seemed to get worse. He was actually on the ground shaking violently,” said Leonard in the interview.

A Portuguese woman on the flight was arrested due to drug offense suspicions, although it’s unclear if she has any connection with the deceased passenger.

For more on travel, Fortune covered Ryanair, another Irish airline, earlier this year.