Detectives from the Directorate of Criminal Investigations have arrested more staffers of the Wells Fargo Security farm in connection to the theft of Sh94.9 million belonging to Quickmart Supermarket.
The four are Joel Oyuchi Mweseli - controller/planner, the in charge of drivers Harrison Mugendi Njeru, fleet supervisor Caleb Ouma Okinyi and the in charge of crew commanders Mr Ronald Ouma Oluu.
Their arrest, DCI says, follows a forensic analysis conducted by detectives.
"Besides negligence of duty, the four staffers who are guests of the state for the weekend are believed to have conspired with the two prime suspects Daniel Mugetha and Anthony Nduiki who are still at large," DCI said.
Friday's arrest makes eight the total number of suspects so far nabbed in the daring heist.
Four others were arrested days ago and over Sh9 million was recovered in a jerrycan at a house in Roysambu.
"Investigations are still underway to track down the remaining suspects, as those apprehended today cool heels at Capitol Hill Police Station pending arraignment at Milimani Law Courts on Monday 27th," DCI said.