The team had served notice on CPI(M) leaders K K Narayanan,MLA representing Dharmadam Assembly constituency and C Krishnan, MLA representing Payyannur Assembly constituency, to appear before the Investigating Officer on May 12.
The notice served a couple of days earlier had asked them to appear before Thaliparamba Deputy Superintendent of Police K S Sudarshan, who heads the Special Investigating Team.
The questioning lasted nearly two hours.
Sudharshan later told reporters that the chargesheet would be submitted at the earliest.
The opposition LDF were protesting demanding his resignation over the solar panel scam.