Officers swarmed an address in Six Ashes, south-east of the town, on the morning of Wednesday, January 27, where they found an extensive cannabis farm and seized hundreds of plants.
A man, aged 52, was arrested on suspicion of the cultivation of class B drugs and two other men, aged 62 and 52, along with a woman aged 33, were arrested on suspicion of the same offence as well as modern day slavery and human trafficking offences.
The 62-year-old man and the woman were released on bail, while the other two men were released under investigation.
At least half a dozen police vehicles were reported at the scene, along with the fire service and an electricity company.
A police cordon was put in place throughout the day as detectives remained on scene.
Detective inspector John Weaver, from Shropshire Proactive CID, said: "This operation was carried out as part of our commitment to tackle serious and organised crime in Shropshire in order to help keep the public safe.
“The cultivation of cannabis does not just keep the drug supply going in the area but it also causes a disruption to the local residents.
"These cannabis farms bring associated harm and we will continue to carry out warrants such as this to disrupt the supply of drugs and minimise the impact on the community.”