A tweet from the New York City Fire Department says that the two workers are trapped on the 45th floor - one level short of the roof.
NBC New York reports that 60 fire officers are attending the scene.
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The complex mix of marketing, merchandising and psychology that sees shoppers parting with £360,000 a minute in the UK's shops.
The Black Friday madness got started early with police called to deal with hordes of frenzied bargain-hunters across the UK.
Paul Kohler, who was set on by four Polish men, said the attack was a thuggery issue, not an immigration problem.