Senate is set to debate contentious changes to elections laws that were passed by the National Assembly last week.
Anti-riot police barricaded Parliament Road and Harambee Avenue as more officers were deployed around Parliament Buildings.
Some senators were forced to abandon their cars and walk to the chambers, a move that angered many.
Nandi Senator Stephen Sang’ asked Speaker Ekwee Ethuro to explain if the police were deployed on his orders.
Minority Leader Moses Wetang’ula wanted to know why Parliament was barricaded.
“Why are the public galleries empty yet this is a matter of great public interest?” he said.
He asked Mr Ethuro to suspend the special sitting until the executive withdraw the security cordon around the August House.
In a rare move, Majority Leader Kindiki Kithure and supported the Minority Leader in condemning the deployment of the officers.
However, Meru Senator Kiraitu Murungi supported the deployment, saying police were meant to assure senators of their security.