A man in his 30s has been arrested by gardaí investigating the murder of a mother and two children.

The investigation was launched following the discovery of the bodies of 37-year-old Seema Banu, her 11-year-old daughter Asfira Syed and six-year-old son Faizan Syed at Llewellyn Court, Rathfarnham in south Dublin on 28 October.

Gardaí said in a statement that a man in his 30s was arrested today and is being detained under the provisions of Section 4 of the Criminal Justice Act, 1984 at Dundrum Garda Station.

Seema Banu and her family had lived in the south Dublin estate for just under a year.

The two children attended the local Educate Together primary school in Ballinteer.

The family moved here in February from Dubai, but were originally from India.

Ms Banu's family described her as the "pillar and heart" of their family.

They said Asfira and Faizan were lovely children who used to share their school work with their relatives in India.

Gardaí were first alerted to the tragedy when they received a call from a neighbour who said the family had not been seen for several days.

The post-mortem examinations established the cause of their deaths as strangulation.

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

Gardaí say investigations are ongoing.