"We will write to the CBI, Centre and the state government in this connection seeking a thorough investigation into the scam," SP state vice president Anil Singh Shekhawat told reporters here.
"BSNL had paid a sum of Rs 202.63 crore as subsidy to Tata Teleservices for works which had no verification from its Technical Department...It was noted by the CAG in its audit report," Shekhawat said.
The SP leader claimed to be in possession of RTI documents as a proof in the matter.
No immediate comments were available from the company on the charge.