CBI sources confirmed that Yeddyurappa's sons B Y Raghavendra and B Y Vijayendra and son-in-law R N Sohan Kumar have been asked to make themselves available at its office here at 10 AM.
The development comes even as the Karnataka High Court today adjourned to June 18, the anticipatory bail petitions filed by Yeddyurappa and the family members.
Yeddyurappa had moved the high court after the CBI court dismissed their anticipatory bail petitions in the case registered by CBI on directions from the Supreme Court.
Last month, the CBI registered the FIR against Yeddyurappa and others and raided their residential and other premises as part of the probe ordered by the Apex Court on recommendations of the Central Empowered Committee set up by it to look into illegal mining.