The drug den was found by police officers during a search of a house in Blyde Road, Fir Vale, yesterday.
A haul of 50 plants, which were nearly ready to crop, were discovered and seized.
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South Yorkshire Police said the electrics had been bypassed, which the force described as ‘a dangerous game to play’.
LATEST: Sheffield mum fears she will never see young son againAnyone with information should call South Yorkshire Police on 101 or Crimestoppers, anonymously, on 0800 555111.