Some 30 cannabis plants were found growing in a house in Great Yarmouth after a tip-off from a member of the public.
Officers were called to a house in Albion Road after someone discovered the plants being grown using hydroponic equipment on Wednesday.
No-one has been arrested and investigations are on-going.
Officers tweeted about the find, describing the crop as 'a large amount.'
In the same social media post, referring to a different incident, they said two men aged 21 and 27 had been arrested for having Class A drugs on them.
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