A man has appeared in the Melbourne Magistrates' Court on trafficking the drug MDMA, or Ecstacy, after a bad batch of the stuff figured in the deaths of three people in Melbourne over the weekend.

Detectives told the court that 20 people were taken to hospital with suspected overdoses after taking the drug at nightclubs around the Chapel Street precinct.  A friend of one of those victims told police that 30-year old Sebastien Verger-Giambelluco sold drugs to her at the Revolver nightclub on the street in South Yarra.  Police confirmed three of the overdoses turned fatal, but they could not say if all of them were linked to Mr. Verger-Giambelluco because toxicology tests are not complete.  Describing the evidence as "tenuous", the magistrate granted bail and the defendant will have to return at a later date.

Although the weekend has passed, Police are concerned that there will be more overdoses:  "A batch of drugs like this will take some time to disappear from the scene," said Detective David Newman to 7 News.  "Drugs such as MDMA are dangerous and manufactured by criminals with absolutely no regard for the safety of the people who take them," he said in a separate statement.

Meanwhile, the clubs are warning their patrons of the bad X.  Revolver printed a warning saying that the "very dangerous" synthetic drug MDMA can cause violent reactions, hallucinations, and may result in death.