The prank was discovered when several teachers and staff at Lier Upper Secondary School found themselves suddenly struggling to stand.
“They felt ill. They were dizzy and felt totally out of it,” Arne Lauvålien, head of the local police, told Norwegian state broadcaster NRK. “They were basically bedridden.”
Suspicion only came to rest on the bakers after two of the teachers was admitted to the local hospital, and tests revealed that they had ingested large doses of cannabis.
“When we began to unravel it, it became clear quite rapidly which of the cakes it had been,” Lauvålien said. “The school knew who had baked the special cake, so we were on the trail of the cake bakers relatively early.”
Police arrested both students, who are in their late teens, last Thursday, the day after they had brought the cake to school. Both admitted to putting marijuana in the cake.
Lauvålien’s colleague Finn Håvard Aas told VG newspaper on Thursday that the two culprits had already been charged with possessing marijuana, and risked further, more serious charges of poisoning.
“This has had major consequences for the teachers, so we are taking this very seriously,” he said.
Lauvålien told NRK that the police were interviewing the teenagers to find out where they had obtained the marijuana and what had driven them to attempt to drug their schoolmates and teachers.
“What we have here is someone who has not thought about the consequences. The teachers have actually been poisoned,” Lauvålien said.