This is the moment cops used a chainsaw to cut their way into a suspected drug den where they arrested a 13-year-old boy on suspicion of having a zombie knife.<br /><br />Dramatic footage shows officers smashing down the front door of the house in Derrydown Road, Birmingham, on January 7.<br /><br />Officers seized 50 wraps of drugs and arrested an 18-year-old man on suspicion of supplying class A and B drugs.<br /><br />A 13-year-old boy was also arrested on suspicion of possessing a zombie knife in public.
