East African Legislative Assembly (EALA) MP Simon Mbugua and Governor Mike Sonko's chief of staff Peter Mugo were on Tuesday evening summoned by the Directorate of Criminal Investigations over alleged plans by youth to cause chaos during Wednesday's court ruling on the governor's bail application.
The two recorded statements at the Nairobi Area DCI office before being freed.
Sonko was arrested last Friday after being linked to a Sh357 million irregular tender alongside other county officials and company owners.
The Nairobi Governor was on Tuesday morning admitted to the Kenyatta National Hospital after he was reportedly taken ill while at Kamiti Maximum Security Prison.
Visiting the governor in hospital has been restricted with only his wife and two of his lawyers allowed to see him.
The Kenyatta hospital private wing has also been under tight security.