A spate of suspected drug overdose deaths across Perth in the past 24 hours have prompted police fears that party drug Fantasy, otherwise known as GHB, could be to blame.

Police have been called to three deaths on Friday night and yesterday across the metropolitan area, which they say are linked to illicit drug overdoses.

Several more people in need of medical intervention were identified.

Police checked with St John Ambulance and they have also reported a spike in drug overdose callouts in recent days.

“While toxicology results on the deaths and emergency hospital admissions are not yet accessible, information from those involved in the response to those incidents have identified the potential use of GHB, or Fantasy, as a possible link to several of the overdoses,” according to a police statement issued late yesterday.

A police spokesman said the alarming incidents serve as a timely reminder to people of the risks of illicit drug use and abuse of prescription medications.

“We ask all those who are using, or who are contemplating using, illicit drugs, and their families and friends, to be extremely mindful of the serious consequences associated with this activity.”