Merseyside Police say three more people have been taken to hospital after apparently taking a substance known as GEEBS.
Emergency services were called to student accommodation at Hatton Garden in Liverpool on Monday. Two men, both aged 20, from the Liverpool and Crewe areas, were taken to the Royal Liverpool University Hospital and later discharged.
A third man, aged 19 years, from North Wales was also taken to the hospital. He has also now been discharged.
A 20-year-old man from the Liverpool area has been arrested on suspicion of possession with intent to supply a controlled drug.
– Detective Superintendent Chris Green, Merseyside Police
Thankfully these men have not suffered serious effects, however I would like to re-iterate my warning to students and young people that if taken, GEEBS, which is actually a chemical used to clean alloy wheels, can have serious side effects and can kill, even in small doses.''