The body, believed to be a victim of recent floods, was discovered floating in the river by residents, who claim that police consistently shirk their responsibilities by offering money to locals, often young boys, to retrieve and pack bodies.
Mathare was inundated this month when the Mathare River, which runs through it, burst its banks after heavy rainfall, killing dozens.
With nearly 69,000 residents, the community struggles with limited access to clean water, electricity, and adequate drainage, posing serious health risks.
The members claimed the timing of these arrests raises suspicion since they occurred amidst criticism by the Mathare Justice Center of the government's handling of the flood crisis.
IDPs are grateful for donations from the government and well-wishers, but say jobs would be more helpful to their quest to sustain themselves.
Many turned up for the camp organised by SHOFCO, with cases including injuries, respiratory illnesses, and diarrhoea.
Ian Henry Otieno family said he was sifting through mounds of rubble at the scene to recover any possessions that were spared the destruction.
Ruto also announced those affected by the floods in the Kiamaiko area will be given priority for the 5,000 affordable housing units that will be put up in Mathare in a bid to have them settled permanently.
The County Aggregation and Industrial Parks project across 27 counties will cost Sh1.45 billion.
The movement also questioned the glaring absence of a proper evacuation strategy and rapid response teams until Wednesday, highlighting how ordinary citizens, lacking the necessary expertise and equipment, were compelled to conduct search and rescue operations.
Leading the project are local youths who opted to construct a makeshift bridge following the aftermath of the flood's devastation, which left many confined to their homes.
The most affected areas include Kibra, Lindi, Mathare, Baba Dogo, Githurai, and Zimmerman, which have suffered extensive damage due to the relentless rains.
According to the Red Cross, 23 counties are grappling with the aftermath of the floods, affecting 24,741 households.
Two of her grandchildren are still missing after the Tuesday's heavy downpour.
The hospital manages around 64,000 patients annually but challenges persist, including insufficient funding, policy implementation issues, and understaffing.
