A 38-year-old man was arrested in the early hours of Sunday morning on suspicion of murdering teacher Sabina Nessa.
Scotland Yard branded the move a ‘significant development’.
He was arrested at around 3am at an address in East Sussex and taken into custody.
Detective Chief Inspector Neil John, from the Met’s Specialist Crime Command, said: ‘Sabina’s family have been informed of this significant development and they continue to be supported by specialist officers.’
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