A Nairobi court has ordered that Wazir Chacha to be held in police custody for seven more days.
Chacha is accused of conspiracy to defraud members of parliament and government officials.
The judge at the Milimani Law Courts declared that the case would be mentioned on April 25.
The decision to extend the lock-up is meant to give authorities more time to complete investigations.
Chacha was apprehended in Tarime,Tanzania for running a mobile money scam that saw senior government officials and legislators lose huge amounts of money.
He is accused of registering mobile money accounts using the details of lawmakers such asMurang'a Woman Representative Sabina Chege
Chacha has denied the allegations claiming that Ms Chege was behind all his woes because of unspecified 'personaldifferences'.