Kisii Senator Richard Onyonka has urged President William Ruto to cautiously deal with the ongoing probe on former Interior Cabinet Secretary Fred Matiang'i.

Senator Onyonka argues that no ex-minister has ever been handled in the manner in which Matiang'i is being handled and might taint the state's image.

"I want to really take it to William Ruto and ask him that he must be very careful with how he handles the Matiang'i story," he said speaking on Citizen TV's Daybreak show on Monday.

"Reason is this is a Cabinet minister and also there has never been a time in the Kenyan administration from 1963 when a person who was serving in that government, especially in the docket that Matiang'i has been serving has been handled the way he has been."

With the recent incidences that have been witnessed in the probe, Onyonka claimed, it shows that the state is persecuting the former minister.

He cited the incident where police officers broke into Matiang'i's home in Karen, claiming that the police might have acted without a court order.

"He has been attacked and his house broken into, nobody knows whether there were court orders for Matiang'i to be arrested," he said.

He also dismissed the report from Inspector General of Police (IG) Japhet Koome that the security detail of former state officers has been scaled down, saying that it was totally withdrawn.

Otherwise, Onyonka added, Matiang'i would not be flying out of the country without the knowledge of security agencies or the President.

"The police IG had said that he scaled down Matiang'i's security but Matiang'i says all his security was taken and I seem to believe him because that is why he was able to travel out of the country and they don't even know," he said.

The former CS was on a two-week travel to the United Kingdom to attend to an 'urgent private matter' and jetted back in the country on Sunday.

Matiang'i is expected to present himself to the Directorate of Criminal Investigations (DCI) headquarters today at 11:00 am. 

He has been under probe by the DCI, questioning him over the alleged police raid at his house in February. 

The Ethics and Corruption Commission (EACC) is also on the former interior minister's neck, mounting scrutiny on his wealth accrued during his 10-year tenure.