Four police officers, including a daughter of a senior Administration Police commandant, were have been arrested over highway robbery.
The four are suspected to have robbed Chinese national Wunei Dun of Sh2 million in Rironi, Limuru, on Saturday.
Mr Wunei runs a gambling business in Nairobi.
The suspects were arrested and locked up on Sunday.
Mr Wunei, 45, told the police that the four suspects made away with the cash after intercepting him on his way to Nakuru.
He said he was with Janet Cheptoo and Ezra Kipngeno aboard a white Totota Probox KCL 958J.
Their vehicle, he said, was blocked by a Subaru and four occupants armed with pistols disembarked and robbed them of Sh2 million and their phones before speeding away towards Nairobi.
After the report was made, Ms Cheptoo and Mr Kipngeno were placed in custody and interrogated as part of the investigations into the incident.
On Sunday, officers from the Flying Squad managed to arrest the four police officers in different parts of the country and locked them up.
Police also managed to recover some money believed to have been part of the heist.
The officers in the case are Administration Police Constable Simon Mwandiki Festus, based at the Directorate of Criminal Investigations in Bomet.
Police said he was found in Nairobi with Sh100,000, the motor vehicle used in the robbery— a white Subaru with registration number KBV 060M— and a pair of handcuffs.
Others are Administration Police Constable Eunice Mburu of DCI Central Police Station in Nairobi, who was found with Sh95,000 at her house in Shauri Moyo, and Kenya Police Constable Kennedy Kobia Gabriel of the Anti Mugging Squad in Nairobi.
Mr Kobia, police claim, deposited some Sh100,000 in his account and was found in his Gachie Estate house with a Walther pistol of serial number 152881 and seven bullets.
The other police officer arrested is Constable Isaiah Kimani Kiboi of DCI Kikuyu, who was seized at his Kilimani police house with Sh150,000 in cash.
On Sunday, Central Police Station Criminal Investigations chief Kiberenge Seroney said the matter involving the quartet had been received and was under investigation.
He, however, did not divulge any more information about the incident.
“This matter is being investigated by Limuru Police Division. The officers were off duty and we really don’t have all information even though we have received the complaint,” Mr Kiberenge said.
The four are scheduled to appear in court in Limuru on Monday afternoon, even as police continue with their investigations into the matter.