April 1: Ronodeep Bose, 26, actor-guitarist and grandson of Soumitra Chatterjee, is unconscious and on ventilator support. A CT scan today did not show any sign of deterioration.

It can be viewed as a good sign, John Vasiloudis, CEO, Institute of Neurosciences, said.

Bose, who was injured in a bike crash in New Alipore a little after midnight on Thursday, underwent a brain surgery at the hospital yesterday.

Joydeep Banerjee, 24, the pillion passenger and his friend, suffered leg and hand injuries but is out of danger.