A fire aboard an AVE high-speed train interrupted the Madrid-Barcelona rail line for about five hours, upsetting the travel plans of some 19,500 passengers, according to El País. Infrastructure manager Adif restored single-track traffic shortly before 21:00, while operators Renfe and Iryo used buses to carry affected travellers to their destinations. The route is Spain's busiest high-speed corridor, so even a short closure causes widespread knock-on disruption. Note that the source describes a fire rather than a derailment.