Mourners at a funeral in Germany got an involuntary high when they were accidentally served hash cake, police said Tuesday.

The funeral party went to a restaurant after the burial in Wiethagen for coffee and cake, a German tradition. After eating the cake, 13 people reported experiencing nausea and dizziness and needed medical treatment.

BAKER CONFUSES WOMAN’S ‘MOANA’ BIRTHDAY CAKE REQUEST FOR 'MARIJUANA'

The Rostock police said the person in charge of the cakes asker her 18-year-old daughter to bake them.

The mother mistakingly gave the wrong cake to the mourners. She instead took the hash cake, which was made for a separate occasion.

The teen is under investigation, the police said.

CLICK HERE TO GET THE FOX NEWS APP

Police said the incident happened in August but was not made public out of respect for the mourners.

The Associated Press contributed to this report.