The Met Police said a 41-year-old man was arrested outside the properties on suspicion of murder and remains in custody, as a mother and her three children have been killed in a house fire in Brent, north-west London.
The emergency services were called to the blaze in Tillett Close, Stonebridge, where they found the victims — a 43-year-old woman, a 15-year-old girl and two boys aged eight and four.
Two terraced three-storey homes were gutted in the fire.
The Met Police said that another woman in her 70s and a teenage girl, both from the same family as the four people who died, were taken to the hospital. Their conditions have not been disclosed.
About 70 firefighters and eight fire engines from stations across Wembley, Park Royal and Willesden were sent out to tackle the blaze, which was reported by neighbours.
In a statement, the London Fire Brigade (LFB) said: “A woman and a child were rescued from the second floor of one property by crews wearing breathing apparatus and received immediate emergency care.”
