The alarm has been lifted around the US embassy in Brussels after suspicious car is found say the Belgian defence ministry.
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The 23-year-old was held on suspicion of doing an act likely to cause an explosion to injure or damage property, and endangering safety.
Three men died on the track between Brixton and Denmark Hill in south London.
This year 21 black-tailed godwits have been released into the wild after being reared in captivity as part of a project to boost breeding nu