THE CBI on Thursday conducted searches at six locations in Delhi and Kolkata at the premises of two software companies in connection with the West Bengal School Service Commission (SSC) scam, officials said.

It is alleged that records were manipulated to favour candidates in the appointment of teachers which has brought the role of the companies under scanner, they said. The searches were conducted at the offices of N D Infosystems Pvt Ltd and NYSA communications Pvt Ltd along with residential premises of their proprietors Niladri Das and Puniit Kumar respectively, they said. It is alleged that the companies were involved in the OMR sheets evaluation, the CBI said.