Ashish Raje, a photojournalist with a Mumbai tabloid, was allegedly pushed and assaulted by two police officials when he was walking to Mumbai Bagh in Nagpada area.
The attack followed a scuffle as the ousted chairman Cyrus Mistry arrived to chair the board meeting of Indian Hotels
The protesters staged a sit-in at the main entrance of Bombay House.
Journalists from across the country gathered and demanded justice amid call for standing up to "forces" trying to the "muzzle" the voices of dissent.