Three senior citizens had an unexpected trip that landed them in hospital after accidentally eating pot brownies at a funeral, RadarOnline.com has learned.

The trio of elderly people were at a memorial service for a mutual friend in Huntington Beach, California, when they started to suffer from "nausea, dizziness, and inability to stand unassisted" after eating what they thought were innocent chocolate treats, reported the Orange County Register.

According to the Huntington Beach Police Department's Facebook page: "At the service, a tray of brownies were offered that has since been determined to have contained 'medical' marijuana.