He killed five children with his lover Myra Hindley, and right up to his death, refused to tell the families of his victims where he had buried them.
Their victims including Pauline Reade, 16, who was raped and beaten before she was killed, John Kilbride, 12, who was strangled and buried in a shallow grave, and Keith Bennett, also 12, whose body was never found and the method of his death never known.
Abedi killed 22 when he detonated a suicide bomb after an Ariana Grande gig in Manchester arena earlier this month.
The singer had just left the stage when the bomber set off his explosive as people were leaving the venue. Saffie Rose Roussos, aged just eight, from Tarleton, Lancashire, was at the concert with her mother Lisa Roussos and half-sister Ashlee Bromwich, 25, who were both taken to different hospitals after being hit by flying shrapnel.
The location is being kept under wraps through fears that members of the public could try to take revenge and defile the bodies.
Muslim leaders across the north east have refused to bless the body of Abedi, after he slaughtered 22 in a suicide bomb attack at a Ariana Grande concert on May 22.
Cemeteries and crematoriums also want nothing to do with the two, leaving them inside the 'Monster Morgue' just outside the Greater Manchester boundary.
Miss Lees' brother Lee Hunter confirmed her death on Facebook.
Earlier this month, police revealed they do not believe Abedi acted alone, and also think he carried his bomb around the city for several hours before detonating it.
Kelly Brewster died when she flung herself over her sister Claire Booth, 44, and 11-year-old Hollie – protecting them from the full force of the explosion.
Relatives said that the 32-year-old civil servant and her partner Ian Winslow, 36, had been planning to have children of their own and had just bought a house.