  The discovery of a neutrino line or, more broadly, a sharp feature in
neutrino data could provide a striking hint for the existence of the dark
matter particle. We review here a search for sharp spectral features using
neutrino data from IceCube. No significant hint for a signal from decaying dark
matter was found in the analysed dataset. Yet, we show a strong improvement of
the limits, which makes it worth discussing how they compare to the limits
obtained from gamma-ray data.

High Energy Physics - Phenomenology