More than 200 cannabis plants were seized by police from a makeshift drugs factory on Bedwas House Industrial Estate.
Officers discovered the large amount of cannabis plants after a warrant was executed at a unit on Bedwas House Industrial Estate, Greenway on Friday May 27.
Cultivation equipment was also seized by police.
No arrests have been made, but Gwent Police are conducting inquiries.
Anyone with information can contact Gwent Police on 101, or Crimestoppers anonymously on 0800 555111.
