The astrophysical nature of the hard x-ray source GRS 1915+105 is
unknown. Recent observations in the radio and near infrared wavelengths
have led to the identification of a counterpart at those energies.
It is likely that GRS 1915+105 may also be identical with the
soft gamma-ray repeater SGR 1900+14 showing recent activities.
In addition, CO measurements indicate the presence of  two
molecular clouds, one of which being a good candidate for a possible
association with the GRS 1915+105. This observational evidence could
be explained by a scenario in which a possible black hole is fed by
accretion from giant molecular clouds and the observed variability
and bursts might be due to thermal instabilities during accretion.
Infrared observations of the quiescent counterpart with ISOCAM are
required to determine the broad-band IR continuum of this unique
source and to study interactions between high energy particles
emitted by the compact source and the surrounding interstellar medium.