Reports indicate that the preliminary investigation by the CBI has found nothing incriminating against the former minister in the murders of Balipur village head Nanhe Yadav, his brother Suresh and Deputy Superintendent of Police Zia-ul-Haq.

Sources in the CBI said the summons were issued to "clear some doubts". The former minister has been asked to present himself at the camp office of the CBI. The notice was sent to Raja Bhaiyya's houses in Kunda and Lucknow late Thursday.