She remains in police custody.
A 27-year-old woman has been arrested following the deaths of two sets of twins in London.
The boys, aged 3 and 4, were killed in a tragic house fire in Sutton, London.
The fire broke out yesterday evening, but despite firefighters' best efforts, the four boys died shortly after in hospital.
The 27-year-old woman was arrested and on suspicion of child neglect.
She remains in police custody.
A spokesperson for the Metropolitan Police in London confirmed there was nobody else but the four boys in the house when the fire broke out.
It is believed the fire was already "well-developed" by the time emergency services were alerted.
The young boys have been named as Kyson, Bryson, Leyton, and Logan.
Their grandfather penned a heartbreaking tribute on Facebook.
Jason Hoath shared: "I am devastated to say that the horrendous house fire that took place in Sutton last night leading to four children losing their lives was my amazing, smart, and beautiful grandsons."
https://twitter.com/vernalscott/status/1471845753438015495
"Kyson and Bryson, aged four, and Leyton and Logan, aged three, were taken too soon."
"They will always be in our hearts and thoughts. Boys I love you forever, Grandad xxx"
The cause of the fire is still unknown at this time.
London Fire Brigade confirmed, "All four children were removed to hospital where, tragically and despite the efforts of all involved, they were pronounced deceased."
London Fire Commissioner Andy Roe expressed his sympathy.
"This is an incident that has left everyone numb with profound sadness. My thoughts are with the family and friends of the children, the whole local community, and all those who will be affected by this fire."
