  The identification of cosmic objects emitting high energy neutrinos could
provide new insights about the Universe and its active sources. The existence
of these cosmic neutrinos has been proven by the IceCube collaboration, but the
big question of which sources these neutrinos originate from, remains
unanswered. The KM3NeT detector for Astroparticle Research with Cosmics in the
Abyss (ARCA), with a cubic kilometer instrumented volume, is currently being
built in the Mediterranean Sea. It will excel at identifying cosmic neutrino
sources due to its unprecedented angular resolution for muon neutrinos (< 0.2
degree for E > 10 TeV events). KM3NeT has a view of the sky complementary to
IceCube, and is sensitive to neutrinos across a wide range of energies. In
order to identify the signature of cosmic neutrino sources in the background of
atmospheric neutrinos and muons, statistical methods are being developed and
tested with Monte-Carlo pseudo experiments. This contribution presents the most
recent sensitivity estimates for diffuse, point-like and extended neutrino
sources with KM3NeT/ARCA.
