Twenty dangerous dogs have been seized by police in one of the largest operations of its kind. Skip related content 
Related photos / videos 'Weapon dogs' are seized by police Enlarge photo More photos: Crime 
  
  
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Specialist officers gave suspected gang members and owners of illegal dogs early morning wake-up calls during raids on 12 addresses in south London. 
  
The aim of Operation Navara was to target "weapon dogs",