A third man has been arrested in connection with the murder with Vinnie Ryan.
He was picked up yesterday evening and taken to Blanchardstown garda station for questioning.
A murder investigation has been ongoing since 25 year old Ryan was gunned down in a gangland style shooting in Finglas on the 29th of February.
Yesterday evening a 43 year old man was arrested.
Two men were picked up earlier this week.
One has since been released without charge, the other man remains in custody in Finglas.