Police and Exeter city council have joined forces to tackle the problem of drug use behind the Exe Bridges retail park.
A clean-up operation has been launched and police have been using dispersal powers to move people on when necessary.
It follows a series of complaints from local residents about people taking drugs under the railway arches and throwing used needles and other paraphernalia into their gardens.
14-year-old girl missing from Exeter
Man reattaches flags moments after removal
Rocket builder careers in Cornwall to soar
'Twas the weather warning before Christmas
Police watchdog investigates after fatal Plymouth crash
