A mobile police station has been set up in Derby to try and crack down on the use of illegal psychoactive drugs, such as Black Mamba and Spice.
It follows concerns in the St Peter's Cross area about anti-social behaviour and people in "zombie-like" states after taking the substances.
Supt Tracy Harrison said the temporary measure is to reassure people the city is safe to visit.
Arrests have been made and dispersal orders issued to deal with the problem.
A number of people have recently been seen in the city centre hallucinating and stupefied after apparently taking synthetic cannabinoid drugs, formerly known as "legal highs".
Supt Harrison said: "We've made a number of arrests, we've seized a number of drugs and taken action against those persons causing the disorder in the city.
"What we really want to encourage over the next couple of weeks is to engage with people coming into the city reassuring them that it is a safe place and we are dealing with the issue that's there."
Officers from the Derby city centre neighbourhood team will operate the office at different times throughout the week.
A 37-year-old man, who had apparently been taking Black Mamba, died in Nottingham on Saturday.
He was pronounced dead at an address on London Road, while a 39-year-old man was taken to hospital in a non life-threatening condition.
Psychoactive Substances Act
- The Psychoactive Substances Act, came into force in 2016, making it illegal to supply drugs which have a direct effect on mental processes
- "Psychoactive substance" means any substance capable of producing a psychoactive effect i.e. if, by stimulating or depressing the person's central nervous system, it affects the person's mental functioning or emotional state
- Up to seven years in prison for anyone supplying or producing, or possession with intent to supply
- Up to two years in prison for possessing a psychoactive substance in a custodial institution
- Prohibition and premises orders, allowing police to shut down shops and online dealers in the UK, with up to two years in prison for those who fail to comply
- More than 500 potentially dangerous drugs have already been banned since 2010 under the Misuse of Drugs Act 1971
- Legal highs include Spice (synthetic cannabis) Clockwork Orange (herbal incense) nitrous oxide (known as laughing gas) and etizolam (a treatment for insomnia and anxiety)