From the BBC site. Great news that there appears to have been no-one inside. I don't quite think it equates to 9/11, suny
Skyscraper blaze lights up Madrid
By Katya Adler
BBC News, Madrid
A short circuit was one early theory for the fire
Sections of a well-known Madrid office building 32 storeys high collapsed on Sunday morning after a fire raged through the upper floors.
No one is believed to have been inside the building when the fire started and the cause has not yet been determined.
Large pieces of the Windsor Building plunged to the ground as the blaze destroyed its top floors, sending columns of black smoke into the night.
Nearby bars, nightclubs and blocks of flats were evacuated.
Spanish television channels interrupted their normal programming to broadcast the dramatic pictures.
A spokesman for the fire services said the building in the business heart of Madrid was empty when the fire started.
He said no civilians had been injured, but three firemen were being treated for smoke inhalation.
Short-circuit theory
Spanish media said the fire appeared to have been an accident.
But Madrid Mayor Alberto Ruiz Gallardon, speaking from the scene of the blaze, was reluctant to speculate:
"All I can say for sure is that the fire started on the 21st or the 22nd floor of the building and that it was empty at the time.
"It's been suggested that the blaze may have been caused by a short-circuit, but I can't confirm any speculation at the moment."
Mr Gallardon said it was impossible for the fire services to put out the fire in the building itself and that there were grave doubts that the concrete skeleton of the office building would hold.