The woman, who has not been identified, was arrested in early hours of Thursday local time in the southeastern city of Ulsan, South Korean police official told CNN.
“To have someone in custody overseas within such a short period of time has all been down to the assistance of the Korean authorities and the coordination by our (New Zealand) Police Interpol staff,” said New Zealand Detective Inspector Tofilau Fa’amanuia Vaaelua in a statement Thursday.
The woman will remain in custody while awaiting the completion of the extradition process, Vaaelua added. The woman’s identity is being withheld to avoid identifying the children.
South Korean authorities confirmed last month that the woman, a dual citizen of New Zealand and South Korea, had arrived in the country in 2018. According to the official, the woman was born in South Korea and acquired New Zealand citizenship a “long time ago.”
Seoul High Court will now decide within two months whether to extradite the woman to New Zealand.
The children — likely to have been between ages 5 and 10 — may have been dead for around three to four years, according to New Zealand police.
At the time, police stressed the family who bought the suitcases were not under investigation.