CBI was on Thursday allowed to quiz NALCO Chairman-cum-Managing Director Abhay Kumar Srivastava and alleged conduit Bhushan Lal Bajaj, arrested in a case of alleged bribery for five more days in its custody. Special CBI Judge O P Saini sent the duo, arrested on February 25 after CBI recovered about 10 kilogram of gold bricks and jewellery valued at around 2.13 crore rupees as also 30 lakh in cash from their possession. CBI's prosecutor told the court that some documents are still to be recovered and both the accused are required to be confronted with the co-accused as well as the documents.