Gardai say they have over a hundred lines of investigation into the murder of a 21-year-old in Dublin.

A murder investigation was launched this afternoon into the death of Lorcan O'Reilly at the Oliver Bond apartment complex.

A post-mortem has been carried out.

Gardai believe that a number of people were in the area at the time of the attack early on Sunday morning and Superintendent Paddy McMenamin is appealing for witnesses to come forward.