Police will crack down on a "new" type of drug known as "powdered milk ketamine", following the deaths of six people in Bangkok on the same day.
Police could not yet confirm whether the substance, which looks like powdered milk, was a combination of ketamine and sleeping pills as speculated, as the results of the autopsies had not yet been released.
An incident, like this, in which so many people died after taking the same drug on the same day has never haooened before, the national police chief said on Monday.
Police suspected that the substance might contain controlled medications smuggled in across the borders.
The chief said the six people were aged between 21-34 years. All of them were believed to have died after taking the drug as the white powdery drug was found at the scenes.
According to a police spokesman, the drug is a combination of heroin, ketamine, methamphetamine and a type of sleeping pill. The drug calms and stimulates the brain at the same time.
The father of one of the people who died on Sunday said his daughter left home around 8pm. After that, he sent her messages but they went unread until he was told of her death.
