  The origin of astrophysical neutrinos is one of the most debated topics
today. Perhaps the most robust evidence of neutrino counterpart comes from
supermassive black holes in active galactic nuclei associated with strongly
collimated outflows, or jets, that can accelerate particles to relativistic
energies and produce neutrinos through hadronic interactions. Similar outflows
can also be found from X-ray binaries, or `microquasars', that consist of a
neutron star or a stellar-mass black hole accreting matter from a
non-degenerate companion star. In some cases, these systems can accelerate
particles up to GeV energies implying an efficient acceleration mechanism in
their jets. Neutrino production in microquasar jets can be expected with
suitable conditions and a hadronic particle population. Microquasar Cyg X-3 is
a unique, short orbital period X-ray binary hosting a Wolf-Rayet companion star
with a strong stellar wind. The interaction of the dense stellar wind with a
relativistic jet leads to particle collisions followed by high-energy gamma-ray
and potentially neutrino emission. Here, using the 10-year neutrino candidate
sample of the IceCube neutrino observatory, we find that the events with the
highest spatial association with Cyg X-3 occur during short-lived high-energy
gamma-ray flaring periods indicating the possible astrophysical nature of these
events.
