FIFA president Sepp Blatter said:
I'm deeply saddened by the tragic death of workers @corinthians arena today. Our heartfealt condolences are with the families.
More top news
There will be a widespread frost and ice to watch out for tonight, with some bitterly cold temperatures too.
Famous faces have helped a boyfriend deliver the ultimate romantic proposal to his girlfriend of 12 years.
The Turk who shot and wounded Pope John Paul II in 1981 has laid flowers on the saint's tomb in St Peter's Basilica, the Vatican said.