A 26-year-old man has been arrested over the murder of an 84-year-old woman and the attempted murder of a nine-year-old boy.
The man is thought to be related to pensioner Louisa Denby who suffered numerous stab wounds at her home in Shipley, West Yorkshire yesterday.
He is also being questioned about the stabbing of the boy, who sustained chest and arm injuries, after the attack in a skate park about 300m from Mrs Denby's home.
A West Yorkshire Police spokesman said another 26-year-old man has also been arrested in connection with the murder.
Three other local men - aged 18, 24 and 29 - have been arrested over the incident in the skate park, he added.
More top news
The widow of a man killed in the Tunisia terror attack has described how she "played dead" after they were both shot by the beach gunman.
A young doctor, who reached his fundraising target of £100,000 last week, has died of a cancer that runs in his family.
Three men have been arrested in Sweden on suspicion of taking part in a rape that was streamed live on Facebook.