A cannabis factory was found in a £400,000 four-bedroomed house in Birmingham.
Neighbours of the house in Wyckham Close, Harborne, yesterday spoke of their shock at learning how a home in their small cul-de-sac had been converted.
Every room in the detached property had been used to cultivate hundreds of cannabis plants under a special lighting and heating system. Police would not say how much the haul was worth but confirmed it was "significant."
Scenes of crime officers spent the day at the house after neighbours became suspicious and alerted the letting agents, Harborne-based Whittle Estates.
One neighbour, who did not want to be named, but who visited the house with police, said: "The smell was awful inside. The entire house has been given over to growing cannabis. In the living room alone there must have been up to 50 pots with plants growing under lighting.
"The house had been empty for some months, then we heard it was being let to a family who had two children but nothing seemed to come of that. Then some weeks ago it was occupied by new tenants. I think someone said they might have been of Malaysian origin. Other neighbours said they saw vans arriving and white boxes being carried in and out.
"The curtains were always drawn day and night and they made a very good job of disguising what was going on in there. We all began to get a bit suspicious, so someone contacted the agents."
Police yesterday were questioning a 43-year-old man who was arrested on suspicion of cultivating cannabis at the property.
Insp Nick Moore, of Rose Road police station, said: "This is a full scale cannabis factory and we are currently in the process of examining the evidence.
"We urge anyone who is suspicious about void or rented premises in their area to contact police.
"Under no circumstances should anyone try to enter these premises themselves as they can be highly dangerous. This was not the case with this property, but some have been booby-trapped electrically to deter intruders."
Coun Deirdre Alden (Con, Edgbaston) said: "This is another example of how cannabis factories like this are being set up in ordinary residential areas. We must all be vigilant."
The cul-de-sac has fewer than 30 homes with a thriving neighbourhood watch group. Most of the residents have lived there a number of years.