Meanwhile, first responders from Kenya Red Cross treated scores of residents who were injured in the protests that broke out after President Uhuru Kenyatta was declared winner of the Tuesday election.
Kenya Red Cross team leader in Mathare Joe Mbalu said they attended to 23 people.
He said many of them had broken bones and soft tissue injuries.
This means they were beaten up, possibly with clubs.
Residents claim General Service Unit (GSU) officers broke into their houses, pulled out the men and beat them up.
At midday, sporadic gun fire and tear gas canisters rent the air in Huruma estate.
There were also screams from homes.
Streets in Mathare were deserted and power supply has been cut off since Friday evening.