Footage of the woman arrested over the alleged murder of two children in Auckland, whose bodies were found in suitcases, has emerged.
The woman, aged 42, is seen being led away from a police station with a jacket draped over her face in the South Korean city of Ulsan.
Korean media reported the suspect said "I didn't do it" as she was led to a police car.
On Thursday, New Zealand police confirmed their South Korean counterparts had arrested the suspect.
New Zealand police have applied to have her extradited, a process which has to be considered by the Korean justice system.
The remains of the children, both primary school-aged, were found on August 11 by a family who lived on Moncrieff Avenue in Auckland's Manurewa.
Four days after they were found, Newshub revealed the family who made the discovery won an online auction for a random assortment of items left abandoned in a Papatoetoe storage unit.
At the time, sources told Newshub police were dealing with "multiple victims".
Included in the belongings, which were taken home and unpacked, were two suitcases concealing the bodies of the young victims.
Moncrieff Avenue resident Zee Ali, who lives two doors down from the family who made the grim find, said it's a relief for the community.
"It kind of puts us at ease, you know, as parents and homeowners. It makes it a little bit easier and [provides] a little bit of comfort in terms of knowing the police have done a wonderful job in ascertaining what's happened," Ali told Newshub.
"I've got a six-year-old, so I don't know what kind of person or parent would have a heart, that did have a heart that could do something like that. Realistically, it's just devastating."
The arrest followed an arrest warrant being issued by New Zealand police under the extradition treaty between South Korea and New Zealand.
Following the arrest, police have praised their international counterparts, saying that to have someone in custody in such a short space of time is "all down" to the assistance from Korean authorities, coordination by New Zealand police and staff at Interpol.
Diane Lee, Korea-NZ Cultural Association co-president, said she felt "deeply sad" about the alleged killings and extended an offer to assist others.
"If anyone needs help, we are ready to help."
The woman was arrested in Ulsan at 1am local time. According to Korean media, she was found "hiding" in an apartment.
The woman's being transported 300 kilometres from Ulsan to the capital of Seoul, where the District Prosecutors' office will decide whether to extradite her.
Canterbury University criminal law professor Neil Boister told Newshub it could be a fairly rapid process.
"It's unlikely that they [South Korea] are going to put up unnecessary roadblocks to this process."
South Korea did reject a US extradition request for a man convicted of running a child sex website in 2020.
But with allegations of murder, professor Boister said it's more clear-cut.
"The factual allegations are so strange, in fact, there's probably pressure to make this happen."
South Korean police have said regulations dictate the court must decide whether to extradite within two months.
A spokesperson for the Korean Society of New Zealand said relatives of the deceased still live in New Zealand and are in a state of shock and disbelief.
Newshub has been told the woman arrested suffered from depression before she fled from New Zealand to South Korea, but police have not confirmed this.
If she did suffer depression, an objection could be lodged to extradition on mental health grounds.
However, Professor Boister told Newshub there's a "very high bar" for this to be successful.
