A family who live at a property in south London where the bodies of three children were found this morning have been described as "really, really lovely people".
A 42-year-old woman has been arrested on suspicion of murder after the bodies were discovered at 9.30pm last night.
The neighbour said the three younger children - four-year-old twin boys and an older girl - were suffering from genetic disorders which are believed to be life-limiting.
She also claimed the eldest child, thought to be around seven or eight years old, was in good health.
The father works in the city and the mother is a full-time carer for her children, the neighbour said.
More top news
Footage showing the "truly shocking" moment a teenager was stabbed to death as he rode his bike with friends has been released.
For thousands of families, today is the day they find out whether their 11-year-olds will go to the secondary school of their choice.
A dangerous "charmer" who murdered his girlfriend over an obsession she was having an affair on Facebook has been sentenced to life.