Authorities in California are currently investigating an incident that occurred during a half-marathon running event in Santa Barbara, where nearly 30 participants required medical attention due to unusual symptoms. In a statement provided to CBS News, the Santa Barbara Police Department reported receiving a report from Santa Barbara Cottage Hospital about race participants who sought treatment for these strange symptoms after the race concluded. The cause of these symptoms has not been confirmed as of yet.

Cottage Health, which operates the hospital, stated that they had seen a larger than expected number of emergency visits from runners following the event. The police department has advised that at this time there is no specific action recommended for the public; however, those who feel unwell should seek medical attention and follow guidance from healthcare professionals.

According to Cottage Hospital, 27 participants from the half-marathon were treated in emergency rooms located in Santa Barbara and the nearby city of Goleta. The majority of them, 24 individuals, were discharged after treatment, while three people remained hospitalized as of Monday in stable condition. One of the runners who sought medical attention told local news outlet KEYT-TV that they had lost consciousness and could not recall parts of the race, raising suspicions about the incident.

During the half marathon, thousands of participants ran along the Pacific Ocean on a day that reportedly saw temperatures reach 86F (27C) by midday, significantly higher than the typical early November temperature of low 70s in the area. Event director David Monico told US media that 15 people were taken from the medical tent to local hospitals due to dehydration and overheating. The Santa Barbara Police Department, Cottage Health, and the half marathon organizers have been contacted for further comment by the BBC.