After the death of a restaurant visitor in Weiden in der Oberpfalz, one thing is certain: the drug ecstasy was found in a bottle of champagne, "in a significant concentration", as Chief Public Prosecutor Gerd Schäfer said on Monday.
He referred to the results of an initial toxicological analysis of the contents of the bottle.
It is still unclear how the drug got into the bottle.
Investigators rule out a targeted attack.
According to Schäfer, there is a suspicion of negligent homicide.
According to previous knowledge, several guests between the ages of 33 and 52 shared a drink late on Saturday evening.
Soon after, all symptoms of poisoning became noticeable, as the investigators announced on Sunday.
Eight of those affected were taken to a hospital, and a 52-year-old from the Schwandorf district died on Sunday night.
According to the police, one victim has now been able to leave the clinic.
A police spokesman said the autopsy could be ordered as early as Monday.
A special commission called "Market" has taken over the investigation.
By Monday noon, some of the injured had already been heard as witnesses.
According to Schäfer, further surveys are pending.