Struggling smartphone maker BlackBerry said it has agreed to sell to a consortium led by its largest shareholder, Fairfax Financial Holdings, for $4.7 billion (£2.9 billion).
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Ms Leadsom has received the backing of Ian Duncan Smith, the former work and pensions secretary.
The former shadow work and pensions secretary is considered a more viable candidate than Angela Eagle, a Labour source has told ITV News.
As many as 10 people have been rescued following the raid, according to a Bangladeshi official.