Ambulance crew tried to resuscitate Alexia but she died in hospital at 18:43 BST on Friday
A five-year-old girl has been killed in an accident in a park play area in which a tree trunk collapsed.
Alexia Walenkaki was in the play area in Mile End Park, east London, on Friday evening when it happened.
She went into cardiac arrest and died in hospital about an hour after the accident, which is being investigated by police.
Alexia's mother said a rope swing snapped, causing a tree trunk to fall on her daughter.
Vida Kwotuah said she was watching her daughter playing when suddenly she saw a "log falling down".
She told the BBC that from the way it broke, she could tell "the log was rotten".
Alexia's brother Austin and mother Vida Kwotuah say her death has left a "void" in their lives
Asked whether she felt the accident could have been avoided, she said: "Surely. If the play equipment was checked properly I'm sure that that log wouldn't have been there, or if it was there it should have been a much stronger one, than the one that killed Alexia."
She said her daughter's death had left a void in her family. "During the day you have friends and family visiting to keep you company so it keeps you strong but at night, Austin and I, when we go to sleep, we just look at her place and it's a void, you go into the bathroom and you see her toothbrush and toothpaste."
The park remains closed, but friends and family have been leaving floral tributes to Alexia.
One tribute reads: "Dear Alexia, you were my best friend in the whole wide world. When I fell over you would pick me up. You were good at football, you are indeed my best friend, Corrine."
Mile End neighbourhood policing team tweeted: "We would like to express our sincerest condolences to the family of Alexia Walenkaki, who tragically died in Mile End Park on Friday."
The Metropolitan Police and the Health and Safety Executive (HSE) are jointly investigating the death.
Post-mortem tests are due to take place on Wednesday.
Tower Hamlets Council said it would not comment while the police and HSE investigations were ongoing.
But a spokesman added: "The council would like to extend its deepest sympathies to the family involved."