  HB9 (G160.9+2.6) is a mixed-morphology Galactic supernova remnant (SNR) at a
distance of $\sim$0.6 kpc. Previous analyses revealed recombining plasma
emission in X-rays and an expanding shell structure in HI and CO emission,
which were correlating with the spatial extent of HB9. In GeV energies, HB9 was
found to show extended gamma-ray emission with a morphology that is consistent
with the radio continuum emission showing a log-parabola-type spectrum. The
overlap reported between the gas data and the excess gamma-ray emission at the
southern region of the SNR's shell could indicate a possible interaction
between them. We searched for hadronic gamma-ray emission signature in the
spectrum to uncover possible interaction between the molecular environment and
the SNR. Here we report the results of the gamma-ray spectral modelling studies
of HB9.
