The eldest daughter of Yorkshire Ripper Peter Sutcliffe's first victim has killed herself after years of torment over her mother's murder.

Bradford lorry driver Sutcliffe began his killing spree with the murder of mum-of-four Wilma McCann in October 1975.

Mrs McCann, 28, was found on playing fields not far from her council home in Scott Hall, Leeds.

She had been stabbed in the neck, chest and abdomen and attacked with a hammer.

Her daughter Sonia Newlands, 39, was found dead at her home in Leeds on December 19. It is believed she hanged herself. West Yorkshire Police said there were no suspicious circumstances.

On the night of Mrs McCann's murder, Sonia, then seven, and her six-year-old brother Richard searched the streets for her when she failed to return home.

Richard later served time in prison for drugs offences before writing two books about his troubled childhood, while Sonia, who used her mother's maiden name and has a 21-year-old daughter, battled alcohol addiction in a rehabilitation centre before her death.

Sutcliffe, 61, of Heaton, Bradford, was convicted of the murder of 13 women and the attempted murder of seven others.