In connection with its probe into the alleged 2G spectrum scam, the Enforcement Directorate has issued summons to certain telecom firms in connection with its probe.

To some new telecom firms asking for certain financial records and documents, official sources said summons have been already issued. However which particular telecom firms have been issued the summons, could not be confirmed.

The CBI told the Supreme Court that it is already investigating the 2G scam and within three month it will complete investigation and file the chargesheet. The ED was also working in close cooperation with the CBI and it had also registered a case under the Prevention of Money Laundering Act.

The sources said, certain other individual connected with the case have also been issued summons to appear before it, beside the telecom firms. CBI has said it was examining transcripts relating to 5,000 calls out of which 3,800 have been analysed, along with 6,000 files and 80,000 pages of documents and it will take two months time to finish the investigation.