A man has died after collapsing at a music venue in Trafford.
At about 4.30am on Saturday 28 September 2013, police were called to Manchester Royal Infirmary following the death of a 30-year-old man.
An investigation into the circumstances surrounding his death has been launched and enquiries are ongoing.
Police were also made aware that five people have been admitted to hospital feeling unwell after taking a controlled drug. They are currently being assessed and treated by medical staff.
All six people attended the Warehouse Project on Trafford Wharf Road on Friday night.
Detective Inspector Aaron Duggan said: “First and foremost, our thoughts go out to the family of this young man following this tragedy.
“We have now launched an investigation to establish the circumstances leading up to his death.
“It is possible that there may a particularly bad batch of drugs out there in the community and that is a concern to us.
"If you attended the Warehouse Project last night and are feeling unwell, I would ask you to go to hospital for a check up as soon as possible.
“I would always urge people not to take illegal drugs and remind them that you do not know what they have been made up with. They can contain poisons and illicit chemicals that can have potentially fatal effects.”
Anyone with information should phone police on 0161 856 7655 or the independent charity Crimestoppers, anonymously, on 0800 555 111.