The Central Bureau of Investigation on Tuesday questioned Uttarakhand Chief Minister Harish Rawat in connection with its inquiry into a sting operation in which he is purportedly seen trying to influence some dissident Congress MLAs.

The agency had called Rawat to appear on Monday as during his questioning on May 24, he is understood to have not answered certain queries to the satisfaction of the probe team, sources claimed.

However, Rawat had rubbished the claims saying he had fully cooperated with the agency.

The CBI had registered a preliminary enquiry on April 29 to probe the "sting operation" purportedly showing Rawat offering bribes to rebel Congress lawmakers to support him during a floor test in the Uttarakhand assembly.

Rawat has denied the allegation and called the video fake after it was released by the rebel Congress legislators but later admitted that he was on camera in the sting operation.

After Rawat's victory in the floor test, the state cabinet met on May 15 and withdrew the notification recommending a CBI probe into a sting operation involving him but his plea to stop the central agency's probe was rejected by the Uttarakhand high court.

It was registered on the reference received from the state government (during President's rule) and subsequent notification from BJP-led central government.

The preliminary enquiry is the first step during which the agency verifies the facts in the complaint received by it. During a PE, the agency can only "request" a person "to join the probe" and cannot summon him, carry out searches or make any arrests.

If verification of facts shows need of further probe, it may register an FIR or else close the PE.

The CBI had also rejected the state government's notification withdrawing the nod for probing the case which was given during President's rule.