The suspects were allegedly caught receiving Sh900,000, being part of the payment of the bribe.
Bribery claims, betrayal and greed marred the high-level talks chaired by President William Ruto to end the transport chaos caused by high cost of fuel.
The man who publicly contradicted two Cabinet Secretaries during the matatu strike talks says he was not part of the decision to suspend the industrial action.
Kaunda denied allegations of receiving a payoff in connection with fuel price negotiations, while also disputing claims of a fully agreed settlement.
Kapila Chandrasena, the former chief executive of SriLankan Airlines, was found at the Colombo home of a relative, said police.
The suspect was released on a cash bail of Sh200,000 with a surety of a similar amount.