A fifth person is being interviewed by police investigating the disappearance of a mother-of-three from Cheetham Hill in Manchester.
Rania Alayed, 25, was reported missing from home on Tuesday 2 July 2013.
Detectives say it is 'extremely out-of-character.'
A 34-year-old man from Gorton was arrested yesterday on suspicion of assisting an offender.
Officers are continuing to interview a 33-year-old man arrested on suspicion of murder and two men, aged 38 and 64, and a woman aged 55, on suspicion of assisting an offender.
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Business Secretary Greg Clark said talks with Peugeot's boss over a potential Vauxhall takeover were both "constructive and reassuring".
He served in Margaret Thatcher's Cabinet as Home Secretary in 1989 and was also a former Governor of Bermuda.
Heavy rain expected from tonight