One suspect was arrested at the City Cabanas Stage along Mombasa Road after he was allegedly found with one of the slain women - Roslyne Akoth's mobile phone.
The dismembered bodies were all found wrapped in bags and stashed in sacks of assorted colours and tied with cords before being dumped into the garbage-filled quarry.
The DCI has urged the public to cooperate with authorities as they conduct the investigation.
The discovery of the bodies emerges at a time when cases of abduction and disappearances are being recorded following the countrywide protests against Ruto's government.
During the recent demolition of houses said to be on riparian land, Daudi and others agitated for a dignified handling of the situation.
Mukuru Kwa Njenga Primary School in the Mukuru slum is one of the beneficiaries of the project announced by Education Principal Secretary Belio Kipsang' on Tuesday at an event marking Menstrual Hygiene Day.
Interior Cabinet Secretary, Kithure Kindiki, said on Friday that the youths will be paid for their labour.