The driver attached to the Cuban doctors who were abducted on Friday will remain in police custody for two weeks.
This follows a decision by the courts allowing police to hold the driver for 15 pending the completion of investigations.
Isaack Ibrein Robow the driver attached to the two Cuban doctors was arraigned in Milimani law courts as the prime suspect in the abduction of the two doctors.
Robow who was unharmed during the abduction incident however did not take plea as the prosecution sought more time to complete its investigations.
During the Friday incident a policeman traveling with the doctors was shot and killed by the armed gunmen.
This comes as police in Mandera launched a crackdown of all pro-box vehicles in the town as the search for the two doctors continues.
68 vehicles were impounded and are currently parked at Mandera Divisional Police Headquarters.
Police are looking to identify the owners of the vehicles through a search at the National Transport and safety authority.
Two pro box vehicles are reported to have blocked the vehicle ferrying the Cuban doctors before the occupants pounced and abducted the doctors.
The government has since withdrawn Cuban doctors stationed in Isiolo, Lamu, Tana River, Wajir And Garissa owing to security concerns.
Doctors in Kilifi have urged the government to beef up security in the region.