Post-mortem examinations on the bodies of three brothers who were found dead in Co Cork have been completed.
Gardaí say the results will not be released for operational reasons.
Emergency services were called to a farmhouse at Curragorm, about 8km from Mitchelstown on Thursday night where the bodies of 66-year-old Willie Hennessy and 60-year-old Paddy Hennessy were discovered in the yard and a shed.
The body of 59-year-old Johnny Hennessey was found in a river the following day.
Gardaí say they are not looking for anyone else in relation to the deaths.
They are continuing to appeal for information on the movements of a red Toyota Corolla - registration 03 WW 1556 - between midnight on Thursday and 10am Friday morning.
Anyone with information is asked to contact Mitchelstown Garda Station on 025 84833, the Garda Confidential Line on 1800 666 111 or any Garda station.
A number of scenes are still being preserved and technical examinations are continuing.
The Garda Síochána Ombudsman Commission said in a statement that it had received a referral on Friday "from a Garda Superintendent related to possible contact between An Garda Síochána and one of the deceased prior to the incident.
"The referral was made under section 102 of the Garda Síochána Act, 2005. The matter is now under examination by GSOC."
