A hospital emergency department in the US state of Oregon has been put under quarantine after multiple people started to hallucinate.
It started when a 52-year-old woman reported people were vandalising her car earlier this week. When police officers arrived and found nothing was wrong, she was sent to Bay Area Hospital with hallucinations.
But soon after the officers escorted her to hospital, a hospital staff member and an elderly woman the patient lived with also began hallucinating, so the ward was put in isolation.
A hazmat team scoured their homes and the ward, but came up empty-handed. Blood samples also proved nothing.
The officer has now been released from the hospital, but says the incident was weird.
"Initial investigations believed that a medication used in patch form may have been the source," the Coos County Sherriff's Office said in a statement.
"An investigation has found that all those patches and potential medications that may have caused the symptoms have been accounted for.
"No source of the contamination has been found. The vehicles, equipment and uniforms have been checked with no contaminates identified or located on or about them."
The investigation is ongoing.