One of Lisbon's most iconic tourist attractions, the Gloria funicular, derailed and crashed on Wednesday evening.

At least 15 people have been killed and 18 more injured, some critically, local authorities have said.

It is not yet clear what caused the carriage to derail.

Here's everything we know so far:

The crash occurred at around 18:05 on Wednesday, near Lisbon's Avenida da Liberdade, according to local authorities.