CAIRO, July 5 (Reuters) - Several Islamist supporters of deposed Egyptian President Mohamed Mursi were wounded by gunfire on Friday as a crowd of several hundred tried to march towards the military barracks where he is held.

A witness told Reuters that he saw several people fall to the ground, wounded by shotgun pellets. Security forces were cordoning the Republican Guard barracks but it was not immediately clear who had opened fire. (Reporting by Tom Perry; Editing by Alastair Macdonald)