Four children who are believed to be related have died in a house fire in south London.
The London Fire Brigade (LFB) said eight fire engines and around 60 firefighters were sent to Collingwood Road, Sutton, at just before 7pm on Thursday to reports of the fire.
Crews faced an â€œintense blazeâ€ throughout the whole of the ground floor of the property, the LFB said.
Four young children were taken out of the house and given CPR by firefighters at the scene before being taken to two south London hospitals where they died.
The fire was under control by 8.36pm and the cause is under investigation.
London fire commissioner Andy Roe said: â€œThis 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.
â€œFire crews arrived quickly and located the children inside the property.
â€œThey were brought out of the house and given immediate emergency care.
â€œThe welfare of our staff involved in this incident is very important to us and all of them will be offered counselling as a priority.â€
The Metropolitan Police said no arrests have been made but road closures were in place.
The force said the childrenâ€™s next of kin are aware and will be provided with specialist support.
Superintendent Rob Shepherd said: â€œThe thoughts of everyone at the South Area Command Unit are with the family and friends of these four young children, who have suffered such a devastating and tragic loss tonight.
â€œI know these sentiments will be shared by the local community, Sutton and London as a whole.
â€œWe remain on scene with our emergency service colleagues and will be working through the night and beyond. At this very early stage the cause of the fire is unknown and will be investigated.â€
Graham Norton, assistant director of operations at London Ambulance Service, said: â€œWe sent a number of resources to the scene including ambulance crews, advanced paramedics, paramedics in fast response cars, incident response officers and members of our Hazardous Area Response Team (HART).
â€œWe also dispatched trauma teams from Londonâ€™s Air Ambulance and Air Ambulance Kent Surrey Sussex â€“ both teams consisted of a paramedic and a doctor in a car.
â€œWe treated four children at the scene and took them to hospital.
â€œOur thoughts are with the family and friends of the four young children and everyone affected by this devastating tragedy.â€