Detectives are questioning a 43-year-old man about the deaths of two people found at a block of flats in the West Midlands.
Police arrested the suspect at the scene on Saturday after conducting house-to-house enquiries.
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A one minute silence has been held at the Queen's Garden Party in memory of the 22 people killed and 59 injured in the Manchester attack.
Mancunians have come together in defiance after a suicide bomber killed 22 people at a concert.
Extra armed police will be deployed to Wembley and Twickenham this weekend, police have confirmed.