Gardaí have begun a murder investigation into the circumstances surrounding the deaths of a mother and her two children at a house in Dublin.

37-year-old Seema Banu and her two children, 11-year-old Asfira and six-year-old Faizan were found dead at Llewellyn Court in Rathfarnham on Wednesday afternoon.

The post-mortems, which concluded this afternoon, have established the cause of their deaths as strangulation, but it has yet to be established how this occurred.

Gardaí are continuing to interview witnesses, conduct extensive door-to-door inquiries and gather and examine all relevant CCTV.

They have been in contact with Seema Banu's distressed husband and the father of the two children, and have appointed a family liaison officer.

They have also been in contact with Seema's family in India.

The house at Llewellyn Court remains sealed off as a crime scene for a third day today, as a detailed forensic examination continues.

Gardaí have commenced a murder investigation and are satisfied the two children were murdered.

However, gardaí have yet to establish how the children's mother Seema sustained her fatal injuries, and who was responsible for the deaths of all three.

The house had been partially flooded after a tap was left on in the room, and a number of ligatures were recovered from the scene.

Garda Headquarters said this afternoon that details of the post-mortem results were not being released for operational reasons, and no arrests have been made at this time.

Gardaí have asked people not to circulate uninformed speculation on social media as they say this is not helping the investigation, and are appealing to anyone with information to contact the investigation team at Dundrum Garda Station on 01-6665600, the Garda Confidential Line on 1800 666 111 or any garda station.

Throughout the day people have continued to lay flowers at the base of a tree outside the house.

Minister of State at the Department of Education, Josepha Madigan, was among those to pay their respects.