Police are questioning a 49-year-old man after a man's body was found in Arnold on Monday evening.
He is thought to have been shot.
The house on Laneham Avenue has been examined by forensic officers.
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The seven-year-old was found dead at a house in Shropshire yesterday evening (Thursday 21 September).
Organisers say police told them they should use diggers to blockade roads to help prevent terrorism. Police say there is no specific threat.
A report claims services could have worked more efficiently in the case of Andrew Cairns, who killed his ex-partner and her young son.