Gardai investigating the death of a young man on board an Aer Lingus flight are questioning a 44 year old woman on suspicion of drug trafficking.

The results of a postmortem on the 24 year old Brazilian man should reveal whether he may have taken a substance that caused him to become ill.

The flight from Lisbon had to divert to Cork, where it's been examined by a garda forensics team.

Juliette Gash reports;

A woman has been arrested by Gardai investigating the sudden death of a 24 year old man on board an Aer Lingus flight last night.

The Brazilian man suffered a seizure on board a flight from Lisbon to Dublin, which was diverted to Cork yesterday evening.

He had earlier become agitated, and had to be restrained.

Another passenger who went to assist the flight crew is believed to have been bitten, and was treated in hospital for his injuries.

The Portuguese woman was arrested in the arrivals hall at Cork Airport last night - under section 2 of the Drug Trafficking Act, after 2 kgs of a powdered substance was found in her luggage.

It's believed she was traveling with the Brazilian man.

A post mortem will be carried out on his body later to try and determine the cause of his death.

Gardai interviewed all 168 passengers and 6 crew at the airport last night.