New Delhi, Aug 24 - Three students of the prestigious All India Institute of Medical Sciences (AIIMS) are under the scanner for alleged involvement in ragging after a surprise check was conducted, though 'nothing conclusive' has been found, the authorities said Monday.

The AIIMS administration received an anonymous call about ragging in the medical college's hostel Friday and a complaint has been registered.

In a letter addressed to AIIMS director R.C. Deka and dean of students Rani Kumar after the surprise check, hostel wardens, junior and senior resident doctors alleged that senior students had been ragging their juniors.

'We are still inquiring into the case. There is no complaint from the freshers. There is no conclusive evidence of ragging yet. Nothing is in black or white. The hostel authorities had conducted a surprise check,' Kumar told IANS.

She explained: 'They had received an anonymous call that students in a certain room were indulging in ragging.