A man questioned in connection with the murder of a City financier has been released on police bail.
John Monckton and his wife Homeyra were attacked
The man was arrested over the murder of John Monckton, 49, and the attempted murder of his wife Homeyra, 45, at 9pm on Tuesday in a west London street.
Mr and Mrs Monckton were attacked by two men in their house in Upper Cheyne Row, in Chelsea, on Monday evening.
The man, in his 30s, has been bailed to return to a west London police station pending further inquiries.
Officers were called to the property in Upper Cheyne Row by the Monckton's nine-year-old daughter, Isobel, at about 1930 GMT.
Mr Monckton, a bond dealer for Legal & General, was pronounced dead in hospital, while his wife remains in a serious condition after what is described as "significant" surgery.
A post-mortem examination revealed Mr Monckton died from stab wounds.