  The IceCube collaboration has observed the first steady-state point source of
high-energy neutrinos, coming from the active galaxy NGC 1068. If neutrinos
interacted strongly enough with dark matter, the emitted neutrinos would have
been impeded by the dense spike of dark matter surrounding the supermassive
black hole at the galactic center, which powers the emission. We derive a
stringent upper limit on the scattering cross section between neutrinos and
dark matter based on the observed events and theoretical models of the dark
matter spike. The bound can be stronger than that obtained by the single
IceCube neutrino event from the blazar TXS 0506+056 for some spike models.
