The man detained on Monday night in connection with the stabbing of Mr Pat Burke (29), son of Sinn Fein councillor Mr Christy Burke, was released yesterday morning without charge.
Mr Burke (29) suffered multiple stab wounds to the heart and abdomen following an incident in Meagher's pub in the north inner city shortly after 9 p.m. on Saturday. According to Mr Burke his son was attacked when he stepped in to break up a fight in the pub following the Leinster football final in Croke Park.
Mr Burke remains in the Mater Hospital where his condition has been described by a hospital spokesperson as "comfortable".
A Fine Gael councillor, Senator Therese Ridge, said yesterday a licensing system for gaming knives needed to be introduced if acts of "senseless violence" were to be curbed.
She said she was "deeply concerned" about the number of young teenagers, particularly girls, who were becoming involved in incidents involving weapons.
Regulation was urgently needed to put "lethal implements" beyond the use of these young people.
A spokesman for the Department of Justice said the laws covering the sale and use of dangerous knives were stringent. "It is an offence to carry a knife with a sharpened blade or any sharpened implement without good cause or lawful authority," he said.
The penalty for possession on summary conviction is a fine of up to £1,000 and/or 12 months in prison; for conviction on indictment it is an unlimited fine and/or up to five years in prison.