Area chief Nicolas Mwonga said the nonagenarian was accosted by unknown assailants shortly after leaving a bank in Metava area, where he had gone to withdraw the money received through the government's Inua Jamii cash transfer programme.
According to the administrator, the thugs slit the deceased's throat before getting away with all the money he had withdrawn.
The body was taken to Kambu Hospital mortuary as police continue with investigations into the incident.
Inua Jamii funds
The cash transfer program is aimed at supporting the most vulnerable members of the community by providing them with a stipend to cushion them from poverty and hunger.
The program targets orphans, vulnerable children, older persons and those with severe cases of disabilities.
Beneficiaries are eligible for Ksh2,000 per month and receive Ksh4,000 bi-monthly.
The government early this week released Ksh8.6 billion for the social protection program targeting 1,072,226 beneficiaries across the country after a four-month delay.
Social Protection Principal Secretary Joseph Motari said each of the beneficiaries will receive Ksh8,000 for July-August and September-October 2022 payment cycles.