At least six NASA bloggers from Kisii are being held by the police in what is perceived to be crackdown against opposition supporters.
On Wednesday, NASA activists slammed Interior Cabinet Secretary for alllegedly ordering for arrest of dissenting voices from both Kisii and Nyamira Counties.
"Six of our youths were arrested and detained for allegedly being in NRM. They were arrested on Tuesday and yet, none has been taken to court," said youth leader Beavon Magare.
Among those believed to held by the police include Dennis Mosoti, Ben Nyamwaro, Paul Ochora , Paul Makini and Rodgers Onyancha.
In various social media forums, youths accused Matiang'i of ordering for illegal arrest of youths from across Gusii.
"He has ordered chiefs and police to arrest all dissidents but we are determined to win this war," wrote Vincent Osumo.
Kisii County Commissioner Godfrey Kigochi remained non-committal over the matter with police also remaining tight-lipped.