A 26-year-old man has been arrested on suspicion of the murder of an 84-year-old woman and the attempted murder of a nine-year-old boy who was stabbed in a skate park, police said.
Officers found the pensioner's body in a bedroom at her home in Prospect Mount, Shipley, West Yorkshire, after reports that the boy had been attacked in the Carnegie skate park in the town.
West Yorkshire Police named the dead woman as Louisa Denby and said she had suffered "numerous stab wounds".
The man was arrested at 4.10am today in nearby Idle on suspicion of murder and attempted murder, a West Yorkshire Police spokesman said.
Another 26-year-old man has also been arrested on suspicion of murder and three other local men have been arrested over the incident in the skate park, the spokesman added.
The boy was taken to Leeds General Infirmary where he remains in a stable condition, police said.
The young victim was airlifted to hospital following the incident at around 4.40pm on Monday.
A police spokesman said: "A nine-year-boy received chest and arm injuries and was transported to Leeds General Infirmary via air ambulance."