LEAD: Fears of coup unfolding in Burkina Faso as President Kaboré reportedly detained by mutinous soldiers
Ouagadougou, Burkina Faso (PANA) - Fears of a coup unfolding in Burkina Faso are growing with reports on Monday of the detention of President Roch Marc Christian Kaboré after heavy gunfire in the capital, Ouagadougou, and around the presidential palace