55-year-old Keane was damn in the chest and arms in June 2015.
The mobster had been approached by two masked gunman in the car- rk of University Limerick where he was postponing for the gym to open for an early morning workout.
Keane was shot as he ran from the attackers anterior to he collapsed almost 100 metres away where an off-duty treat gave him first aid until ramedics arrived.
Two men aged in their 30s were interrupted early this morning in the Limerick area.
They are currently detained covered by Section 50 of the Criminal Justice Act, 2007 at Henry Street and Mayorstone Garda Stations.
A third man (50s) was also interrupted in Limerick shortly before noon.
He is detained at Roxoboro Road Garda Locate under Section 30 of the Offences against the State Act, 1939.
This fetches to 9 the number of people arrested to date.
Investigations are ongoing.