Portugal is reeling from one of the worst transport disasters in its recent history after the iconic Gloria funicular derailed in Lisbon on Wednesday evening, killing 17 people and injuring at least 20 others. Five of the injured remain in critical condition.

The tragic accident occurred at approximately 6:05 p.m. near Avenida da Liberdade, one of the capital’s busiest and most historic areas. The funicular, a beloved symbol of Lisbon’s heritage and a major tourist attraction, was traveling downhill when it reportedly lost control and slammed into a nearby structure.

Authorities say the cause of the crash is still under investigation. Preliminary reports from local media suggest a cable may have come loose along the track, causing the historic vehicle to lose control on its steep route.

Emergency responders flooded the scene, with sirens echoing through the capital’s streets as residents watched in shock. One local resident told reporters: “I thought it was construction work at first, then I saw many ambulances. It was chaos.”

Police are currently working with the operator of the Glória funicular to determine exactly how many people were on board at the time and to establish the precise cause of the accident.

In response to the tragedy, the Portuguese government has declared a national day of mourning. Flags across the country are flying at half-mast in memory of the victims, and several public events have been cancelled.

Prime Minister António Costa is expected to address the nation later today, as rescue operations and investigations continue.

Capable of carrying more than 40 passengers per car, the funicular is especially popular in late summer when Lisbon is filled with tourists.