The local government in Spain have confirmed at least 64 people have been killed and dozens seriously injured in a high-speed train crash south of the Spanish capital, Madrid.

This comes after another train crash on the same line killed 46 people in January of this year.

Exact details of what happened this morning are still unknown, although it's believed that a controller in Madrid may have given the driver of the high-speed train wrong instructions.

Joining Ciara with an update on what we know to date is Spain-based Journalist, Simon Hunter.