Overview

• The explosion occurred Wednesday night at the Rancagua school campus in Pergamino during a classroom experiment intended to mimic a volcanic eruption.
• Witness video shows the setup detonating violently and sending fragments toward spectators, causing cuts, burns and contusions.
• Most of the injured are students, and ambulances took the victims to Hospital San José for treatment.
• A girl in the front row suffered severe facial trauma with risk to an eye, and clinicians evaluated transferring her to a higher-complexity center.
• Local reports differ on next steps for the most critical patient, with one outlet saying she was moved to Hospital Garrahan, while authorities have not yet detailed the cause or accountability.