ADGP (South Zone) A.Hemachandran, who is probing the solar panel scam, on Tuesday questioned accused Saritha S.Nair at the Ambalappuzha police station for nearly four hours. He said later that it was only a preliminary round of the investigation process. He also did not rule out the possibility of questioning main accused Biju Radhakrishnan and Saritha S.Nair together as part of the investigation.

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