A man in his forties has been arrested in connection with the killing of a 23-year old man in north Dublin last night.
Dean Fitzpatrick died after he was stabbed several times at Burnell Square apartments at Northern Cross on the Malahide Road shortly before 11.30pm last night.
Mr Fitzpatrick is the brother of Amy Fitzpatrick, the 15-year-old girl who went missing in Spain in 2008.
A man in his 40s was arrested this afternoon in connection with this investigation and is being questioned at Coolock Garda Station.
A murder investigation is now underway and gardaí appealing for witnesses