  The International Gamma-ray Astrophysics Laboratory (INTEGRAL) has been
surveying the sky above 20 keV since its launch in 2002 providing new insights
into the nature of the sources that populate our Universe at soft gamma-ray
energies. The latest IBIS/ISGRI survey lists 929 hard X-ray sources, of which
113 are reported as unidentified, i.e. lacking a lower energy counterpart or
simply not studied in other wavebands. To overcome this lack of information, we
either browsed the X-ray archives, or, if no data in the X-ray band were
available, we requested Target of Opportunity (ToO) observations with the X-ray
Telescope (XRT) on-board the Neil Gehrels Swift Observatory. Following this
approach, we selected a sample of 10 objects for which X-ray data were key to
investigate their nature. We found a single X-ray association for all of the
sources, except for IGR J16267-3303, for which two X-ray detections were
spotted within the IBIS positional uncertainty. We then browsed multi-waveband
archives to search for counterparts to these X-ray detections at other
wavelengths and analysed X-ray spectral properties to determine their nature
and association with the high-energy emitter. As a result of our analysis, we
identified the most likely counterpart for 7 sources, although in some cases
its nature/class could not be definitely assessed on the basis of the
information collected. Interestingly, SWIFT J2221.6+5952, first reported in the
105-month Swift/Burst Alert Telescope (BAT) survey, is the only source of the
sample for which we did not find any counterpart at radio/optical/IR wavebands.
Finally, we found that two IBIS source, IGR J17449-3037 and IGR J17596-2315 are
positionally associated with a Fermi Large Area Telescope (LAT) object.
