David Miliband, who triggered the South Shields contest when he decided to quit as an MP, congratulated Labour's Emma Lewell-Buck, who won the seat with a reduced majority of 6,505.
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ITV News witnesses the devastating aftermath as 600 people remain missing and 300 are confirmed dead.
Wayne Lotter, the co-founder and president of the conservation organisation PAMS Foundation, has been shot dead by gunmen in Tanzania.