A concert held in Istanbul late at night, attended by 5,000 people, resulted in three attendees falling ill. The individuals were promptly transported to a hospital for medical attention. Sadly, one of those hospitalized, identified as F.A., succumbed to their condition despite intensive medical intervention. The condition of the other two individuals remains under observation as they continue to receive treatment. Authorities are currently investigating the potential causes of the illnesses and evaluating all possible factors that may have contributed to the tragic outcome. The incident has raised concerns regarding safety measures at large public gatherings in Istanbul.