Brazilian club Corinthians, who will occupy the Sao Paulo stadium upon completion, issued the following short statement on their website:
The board of Corinthians Paulista Sports Club deeply regrets the accident earlier at Corinthians Arena.
No other information at this time.
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A top temperature of 9 or 10 Celsius (48-50 F).
The poll comes ahead of a debate in the House of Commons on Friday on a new Bill which would introduce such a system in England.
Jobs with decent pay and flexibility are "few and far between" for single parents who are the main earner and carer, said the report.