  The ANTARES neutrino telescope, located in the Mediterranean Sea, and the
IceCube neutrino observatory, located at the geographic South Pole, both search
for cosmic neutrino events with an instantaneous full-sky field of view. The
different characteristics of the two telescopes, in particular the larger
instrumented volume of IceCube and the better visibility towards the Southern
Sky for neutrino energies below 100 TeV of ANTARES, are exploited in a combined
search for point-like and extended sources. The sensitivity to neutrino sources
located in the Southern Sky is improved by a factor of $\sim$2 compared to
individual studies. The data samples used in this analysis correspond to all
track-like and shower-like events from the direction of the Southern Sky which
were included in the nine-year ANTARES point-source analysis, combined with the
through-going track-like events used in the seven-year IceCube point-source
search. In this analysis, the Southern Sky is scanned for possible excesses of
neutrinos that might indicate the presence of a source, while the coordinates
of predefined candidate neutrinos sources are also evaluated in order to limit
the penalty of trials. In addition, special focus is given to the region around
the Galactic Centre, treated as an extended neutrinos source, and to the
location of the supernova remnant RXJ 1713.7-3946. The result of this combined
search for galactic and extra-galactic neutrino sources in the Southern Sky is
reported here. No significant evidence of cosmic neutrino sources is found and
flux upper limits from the various searches are presented.
