Hundreds of people who may have obtained wealth through unscrupulous means could find themselves on the receiving end as October deadline for Sh1000 old notes near.

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Central Bank of Kenya has given until October 1st for all Kenyans to return the old notes, adding that thereafter, they will cease to be legal tender.

And CBK boss Patrick Njoroge on Thursday said he'd team has shared with DCI George Kinoti critical information that will lead to arrest of rogue millionaires.

The CBK boss said the bankers have marked people making fishy transactions, adding that the names have been surrendered to the DCI.

“We have shared the information we have gathered so far with the DCI for further investigations. Our role as the regulator is to work with the investigating agencies to ensure that we achieve our goal,” Dr Njoroge said on Thursday night on Citizen TV.

He said investigations on people holding illicit money would continue even after the old notes are phased out after September 30.

So far, he said, banks have collected more than 100 million pieces of old Sh1,000 notes out 217 million pieces that were in circulation when the demonetisation was announced.

“We expect to collect more notes as the deadline nears because most people like doing things the last minute,” he said.

The changing of currency was seen as a measure by President Uhuru Kenyatta to stem up the fight against corruption, which he insists that is one of his legacy.