A 17-year-old youth, also from Brazil, is expected to be charged this morning in connection with the matter.
The victim, aged 35 and married, was found with a knife lodged in his head in Duleek, Co Meath, late on Sunday night.
Garda sources said initial inquiries suggested the stabbing may have stemmed from a row over the injured man’s car. It’s understood the car would not start and he accused the attacker of interfering with it. The two, who know each other, had been in a nearby pub socialising prior to the attack.
The youth was arrested at 3am yesterday, at his home in Duleek where he lives with his mother. He was detained under Section 4 of Criminal Justice Act, which allows for an initial detention period of 12 hours which can be extended for a further 12 hours on application to the court which came into effect after 3pm yesterday.
The language barrier slowed the investigation as officers had to await the arrival of a Portuguese-speaking interpreter.
The youth has been in Ireland for a couple of years, while the injured party has been living here for six years.
The injured man was taken to Our Lady of Lourdes Hospital in Drogheda, but was later transferred to Beaumont Hospital in Dublin, which is a specialist centre for head injuries.
A hospital spokeswoman yesterday said the man was in a “critical condition”.
Meanwhile, gardaí investigating a separate knife attack in Co Tipperary on Sunday said they were making good progress in their inquiries.
Two men, aged in their 20s, suffered serious stab wounds in Carrick-on-Suir when up to 60 people became involved in a row between two gangs of youths.
One of the men is understood to have been stabbed repeatedly in the back and required 100 stitches.
The other was stabbed in the neck and is said to be in a more serious condition at Clonmel hospital, although his condition is described as stable.