Gardaí investigating the ongoing Hutch-Kinahan feud have arrested three people in connection with the murder of Michael Keogh in Dublin last year.
The 27-year-old was shot dead on 31 May 2017 in the car park of an apartment block on Dorset Street.
Two men in their 40s and a woman in her 30s are being questioned at a Dublin garda station.
One of the men and the woman are being detained under anti-gang legislation and can be questioned for up to seven days.
The other man is being held under Section 4 of the Criminal Justice Act and can be interviewed for 24 hours.
The murder investigation is being conducted by gardaí from the north central division.