  We present a study of ISOGAL sources in the "intermediate" galactic bulge
($|$$l$$|$ $<$ 2$^\circ$, $|$$b$$|$ $\sim$ 1$^\circ$--4$^\circ$), observed by
ISOCAM at 7 and 15 $\mu m$. In combination with near-infrared (I, J, K$_{\rm
s}$) data of DENIS survey, complemented by 2MASS data, we discuss the nature of
the ISOGAL sources, their luminosities, the interstellar extinction and the
mass-loss rates. A large fraction of the 1464 detected sources at 15 $\mu m$
are AGB stars above the RGB tip, a number of them show an excess in
([7]-[15])$_{\rm 0}$ and (K$_{\rm s}$-[15])$_{\rm 0}$ colours, characteristic
of mass-loss. The latter, especially (K$_{\rm s}$-[15])$_{\rm 0}$, provide
estimates of the mass-loss rates and show their distribution in the range
10$^{-8}$ to 10$^{-5}$ M$_{\rm \odot}$/yr.
