  The IceCube Neutrino Observatory has recently found compelling evidence for a
particular blazar producing high-energy neutrinos and $\mathrm{PeV}$ cosmic
rays, however the sources of cosmic rays above several $\mathrm{EeV}$ remain
unidentified. It is believed that the same environments that accelerate
ultra-high-energy cosmic rays (UHECRs) also produce high-energy neutrinos via
hadronic interactions of lower-energy cosmic rays. Two out of three joint
analyses of the IceCube Neutrino Observatory, the Pierre Auger Observatory and
the Telescope Array yielded hints for a possible directional correlation of
high-energy neutrinos and UHECRs. These hints however became less significant
with more data. Recently, an improved analysis with an approach complementary
to the other analyses has been developed. This analysis searches for neutrino
point sources in the vicinity of UHECRs with search windows estimated from
deflections by galactic magnetic fields. We present this new analysis method
for searching common hadronic sources, additionally including neutrino data
measured by ANTARES in order to increase the sensitivity to possible
correlations in the Southern Hemisphere.
