New Delhi, Nov 24: Six more persons were arrested in Delhi and Pune in connection with the leakage of question papers for Combined Admission Test for Indian Institutes of Management even as the CBI today did not rule out the possibility of probe into leakage of exam papers earlier. Delhi Police arrested four persons, alleged to be touts, outside the same hotel where the CBI had carried out raid yesterday and arrested four others including its kingpin Ranjit Singh alias "Ranjit Don". The CBI was likely to take over the custody of the four touts tomorrow.
In Pune, the police arrested two brothers raising the total number of people booked there so far to seven. With this, the total number of arrests in the country wide racket went upto 15.
CBI director P C Sharma told here that he did not rule out the possibility of the agency probing the role of four persons in possible leakage of previous entrance examination papers.
In reply to a question whether the CBI would be limiting its probe to the present leak only, the CBI director said, "No. We might have to carry out the probe into earlier exams also. The investigation has to go backwards."

The Central Bureau of Investigation (CBI) today raided a pharmaceutical company in suburban Dahisar in Mumbai in connection with the cat exam paper leak at Delhi and Pune yesterday.
A CBI team, consisting of men from Delhi, led by SP Kiran Jadhav of Mumbai, raided Radon Pharmaceuticals Limited at Dahisar in north Mumbai this evening.
Meanwhile, taking serious view of the leakage of CAT question paper for Indian Institutes of Management, Human Resource Development Minister Murli Manohar Joshi today set up a committee to inquire into the issue. Bureau Report