Four people have been arrested in connection with the murder of Maurice Martin in Dublin earlier this month.
A 24-year-old man and three women, aged 20, 21 and 22, were arrested at a number of locations in Finglas this morning.
They are being questioned at Finglas, Blanchardstown and Cabra garda stations.
The body of the 21-year-old was discovered with stab wounds at the junction of Cardiffsbridge Road and Tolka Valley Road in Finglas on 12 June.
