An important prosecution witness in 2G case Shankar Mathur, former Telecom Secretary may appear a Delhi court on Monday, reports PTI.

Mathur in his statement to the CBI, had said it was former Telecom Minister A Raja who had decided to prepone the cut-off date for the receipt of new applications for Unified Access Services Licences (UASL).

Earlier, October 1, 2007 was fixed as the last date for receiving applications, but it was preponed to September 25.

According to PTI, the CBI had alleged that Raja, in collusion with others, had decided to keep September 25, 2007 as the cut-off date for considering the applications for UASL to "wrongly benefit" Unitech Ltd MD Sanjay Chandra and Swan Telecom promoters Shahid Usman Balwa and Vinod Goenka -- all facing trial in the case.

Mathur, a 1971 batch IAS officer who had joined as the telecom secretary in July 2006 and retired from the post on December 31, 2007, had said that Raja decided to prepone the cut-off date to be September 25, 2007 without having any "reasonable justification."