  The Weakly Interacting Massive Particle (WIMP) is a popular particle physics
candidate for the dark matter (DM). It can annihilate and/or decay to neutrino
and antineutrino pair. The proposed 50 kt Magnetized Iron CALorimeter (MagICAL)
detector at the India-based Neutrino Observatory (INO) can observe these pairs
over the conventional atmospheric neutrino and antineutrino fluxes. If we do
not see any excess of events in ten years, then INO-Magical can place
competitive limits on self-annihilation cross-section ($\langle\sigma
v\rangle$) and decay lifetime ($\tau$) of dark matter at 90\% C.L.:
$\langle\sigma v\rangle\leq 1.87\,\times\,10^{-24}$ cm$^3$ s$^{-1}$ and
$\tau\geq 4.8\,\times\,10^{24}$ s for $m_\chi$ = 10 GeV assuming the NFW as DM
density profile.
