An 18-year-old man was fighting for his life today after a street brawl involving a group of youths.
The teenager suffered severe head injuries in the assault in Dundalk, Co Louth, last night.
The row broke out in Castle Road between 9.00pm and 9.20pm.
A Garda spokesman said the young man was being treated in Our Lady of Lourdes Hospital.
His condition was described as critical.
The spokesman appealed for anyone who may have been in the Castle Road area between 9pm and 9.30pm last night or anyone with information on the attack to contact Dundalk Garda Station.