DISCLAIMER: this event description is unsatisfactory. Details on the system and the real incident evolution are (still) missing. The incident affected a prototype light hydrogen vehicle in a hydrogen research centre of a university. The vehicle was a kind of a four-wheeled scooter. The fire started on the vehicle while being filled. Apparently, the hydrogen storage system was a hydrogen hydride. The site was evacuated and the building isolated from its hydrogen supply. The firefighters attacked the fire with a hose and extinguished it one hour later. Temperature and visual checks were carried out at the level of the vehicle, to check the potential persistence of invisible flame. The building containing the vehicle was ventilated and the fire panel and the automatic hydrogen detection were put back into operation. A plug was placed on the tank to isolate it from the external element suchas air or water. The safety valve is unscrewed to prevent any rise in pressure in the event of possible desorption of the hydride. The vehicle's lithium battery is submerged in a tank of water and remains under the supervision of a company security guard overnight.