Police have seized a cannabis farm worth around a quarter of a million pounds - after patrol officers noticed an unusual smell coming from a house in Liverpool.
Patrol officers found around 60 plants in a garage in Allerton, along with growing equipment.
They say such properties are potential "death traps" - posing as fire and flood risks, and attracting further crime.
Matt Brown, who leads the force's Cannabis Dismantling Team, said "Groups involved in the cultivation of cannabis are often involved in other serious organised crime, which brings significant harm to those communities."
"Each seizure represents money being taken from the pockets of criminals and we encourage members of the communities to report any concerns to police."
A 15-year-old boy from Tranmere in Wirral was arrested on suspicion of cannabis production, cannabis supply and cannabis possession and taken to a police station for questioning. He has been released under investigation while enquiries continue.