Ricky Hatton will announce his return to the ring at a press conference later. The boxer will fight on November 24 at the Manchester Arena against an opponent yet to be named.
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Kinga Krasuta is 42 weeks pregnant and could go into labour at any time.
The Bolivian government had earlier confirmed Deputy Interior Minister Rodolfo Illanes had been kidnapped and was at risk of torture.
At least one person has died after part of the building collapsed shortly after midnight, according to local reports.