  We present preliminary results of the analysis of 5 years of MACHO data on
the Galactic bulge microlensing events with clump giants as sources. This class
of events allows one to obtain robust conclusions because relatively bright
clump stars are not strongly affected by blending. We discuss: 1) the selection
of `giant' events, 2) the distribution of event durations, 3) the anomalous
character of event durations and optical depth in the MACHO field 104 centered
on (l,b) = (3.1, -3.0). We report the preliminary average optical depth of (2.0
+/- 0.4) x 10^{-6} (internal) at (l,b) = (3.9, -3.8), and present a map of the
spatial distribution of the optical depth. When field 104 is removed from the
sample, the optical depth drops to (1.4 +/- 0.3) x 10^{-6}, which is in
excellent agreement with infrared-based models of the central Galactic region.
