The two legislators said the police must be held to account following the death of "innocent" civilians who only opposed the October 26 repeat presidential election.
Mavoko MP Patrick Makau and Machakos woman rep Joyce Kamene said this during the burial of one of the victims on Friday.
Joseph Kaloki, 15, who was shot dead at Jua Kali slum in Athi River town was laid to rest at their home in Mulau village in Mwala, Machakos County.
The legislators promised to file a case in court to seek justice for the victims. They did not specify the timeliness for the same.
They said governments across the world should protect their citizens but not kill them.
"It is painful to bury a 15-year- old boy who only obeyed his mother who had sent him to a shop," Kamene said.
Makau accused the Jubilee administration of abetting atrocities against citizens saying it must be held responsible.
He said those behind the deaths and maiming of two other residents during the protests must be held to account.