THREE boys aged 4, 8, and 15, along with a woman have tragically died in a house fire.
Emergency services rushed to the scene of the blaze in Brent, northwest London at 1.20am.
A 43-year-old woman and three boys, aged 15, eight and four, died at the scene.
Two others were taken to hospital, The Met Police said.
The family of those who died in the inferno have been informed.
A 41-year-old man was arrested at the scene and remains in custody.
Superintendent Steve Allen, from the Met’s local policing team in north-west London, said: “This is an extremely tragic incident and our thoughts are with everyone involved.
“Officers arrested a man at the scene and we continue to work alongside investigators from the London Fire Brigade to establish the cause of the fire.
“Emergency services will remain in Tillett Close throughout the day as these enquiries take place.”
Anyone with information that could assist the investigation is asked to call 101 quoting CAD 509/24May.