Two men and a woman arrested on suspicion of producing what was described by police as Class A drugs were released on bail on Wednesday.
No drugs were found during a search of the house on Larkfield Square in Lurgan, which was raided by detectives accompanied by ammunition technical officers (ATOs).
The two men, aged 48 and 50, and a 50-year-old woman were released on bail following questioning. Further enquiries will be conducted, the PSNI said.