An employee for Hearst TV, who works in the building where the workers are trapped, has tweeted that the lower three floors have been evacuated in case the scaffold collapses.
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There were shocks, tears and skimpy outfits at the star-studded MTV Video Music Awards in LA.
Ferry services from Calais have resumed in the wake of Sunday's blockade but passengers have been warned they face delays.
US horror filmmaker Wes Craven, best known for A Nightmare on Elm Street and the Scream movies, has died at the age of 76, his family said