The bench asked the investigative agency to explain about it tomorrow during further hearing of the case. 

"If it is correct, it is serious but if it is not correct, it is more serious," the bench said adding "how the judge came to the conclusion that white fluid came from outside." 

At the outset of proceedings Senior Advocate Harish Salve, appearing for Nupur said the special CBI court erred in taking cognisance of the murders against her and her husband Rajesh Talwar and discharging another accused Krishna from whose pillow the blood stains of Hemraj had been found.