At least 30 people have been killed, according to regional officials, after a Spanish high-speed train collided with another train south of the capital Madrid - here's what BBC las learned so far.More than 500 passengers were travelling on the trains involved, and an initial death toll of 10 "will almost certainly rise", the spokesperson for the regional government says.Spain's Prime Minister Pedro Sánchez says he is "shocked by the serious train accident" and is in constant contact with the tra...
