Five men have been arrested after detectives raided two addresses in Stoke-on-Trent.
Officers executed a warrant at an address on Sandwood Crescent in Longton at around 9.30am yesterday (11 July), and discovered a number of chemicals believed to be used in drug manufacturing.
Two men, aged 32 and 29, were arrested on suspicion of being concerned in the production of class A drugs.
A 26-year-old man was also arrested on suspicion of being concerned in the supply of a controlled drug.
Another address on Portland Street in Hanley was also searched as part of the investigation and a number of chemicals were discovered.
A 40-year-old man and a 24-year-old man were arrested at the scene on suspicion of being concerned in the production of class A drugs.
All five men remain in custody.
Officers are working with Staffordshire Fire and Rescue Service to remove items.
Anyone with information is asked to call 101, quoting incident number 178 of 11 July.