**Police in Berlin say two people have died and a third is in a coma after taking part in a group therapy session.**At least 12 people involved in the psychotherapy class were taken to hospital with suspected poisoning.
A doctor who was leading the session has been arrested and detectives are investigating the case, police added.
A police spokesman said participants were given certain substances. He did not specify. Some reports say heroin, amphetamines and ecstasy were used.
The group was taking part in a group psychotherapy session in Berlin’s Hermsdorf district on Saturday, when the emergency services were called by one of the participants, reports say.
A Berlin police spokesman, Michael Gassen, said: “At this session the participants were given substances. What kind of substances these are… has to be investigated now.”
According to local media reports, the group took a mixture of heroin, amphetamines and ecstasy. It is unclear whether the drugs were injected or taken in tablet form, local reports add.
Police say a 59-year-old and a 28-year-old were amongst the dead. Some reports say a number of the participants who had been taken to hospital were discharged on Sunday.