It is expected DNA and forensic test results from the getaway car used by those involved in the killing of Eddie Hutch in Dublin on Monday night will be available to the Gardaí shortly.
Mr Hutch was shot dead when four masked gunmen entered into his house on Poplar Row in North Strand shortly before 8pm.
It is believed his killing was in retaliation for the murder of David Byrne at Drumcondra's Regency Hotel on Friday.
It is understood Gardaí have identified some of those involved in the killing of David Byrne.
The Garda Commissioner has said they are considering terrorism as one of many lines of inquiry following two fatal shootings.
An armed Garda presence is expected to remain in place around the city in the coming days.