A nine-year-old boy remains in hospital as detectives investigate links between his stabbing, the murder of a retired teacher and an incident in which an eight-year-old girl was chased through a garden.
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Warm and humid over the next few days with rain at times in the north.
Warm temperatures will return to parts of the UK this week, hitting highs not seen since mid-July.
British runner Sir Mo Farah has completed his final track race in Great Britain by winning the 3000m at the Birmingham Grand Prix.