Police uncovered a cannabis farm in a late night raid on a Halifax house after being alerted by neighbours.
Police swooped on a property in Gibraltar Road at 11.30pm on Wednesday and uncovered 70 cannabis plants on three floors.
No arrests have yet been made but a police spokesman said a suspect had been identified. Enquiries are ongoing.
Anyone who suspects cannabis is being grown in their area can call police via 101 or Crimestoppers, in confidence, on 0800 555111.