A 16-year-old boy has been arrested in connection with the investigation into the fatal shooting of a man in Dublin on Tuesday.
Stephen Byrne, 32, was shot a number of times in the head and body by a lone gunman near his home in Sheriff Street.
A 15-year-old boy who was arrested in connection with the shooting has been released without charge.
A man in his late 20s is still being detained at Store Street Garda Station.
Gardaí have appealed to anyone who was in the area at the time to come forward.
They believe Mr Byrne's killer left the scene on a bicycle.
