  The INTEGRAL satellite has been observing the gamma-ray sky for 15 years and
has detected over 900 X-ray sources of various nature. However, more than 200
of these sources still lack precise identification. Our goal is to reveal the
nature of the high-energy sources detected by INTEGRAL. In particular, we want
to improve the census of X-ray binaries. Photometry and spectroscopy were
performed in July 2012 on 14 INTEGRAL sources in near-infrared at the Very
Large Telescope on the European Southern Observatory-UT3 telescope equipped
with the ISAAC spectrograph. We used K$_s$ images reaching to a depth of
magnitude 18.5 to look for unique counterparts to high-energy detections to
check for both extended sources and photometric variability. The analysis of
near-infrared spectral features allows us to constrain the nature of these
X-ray sources by comparing them to stellar spectra atlases. We present
photometric and/or spectroscopic data for 14 sources (IGR J00465$-$4005, IGR
J10447$-$6027, IGR J12489$-$6243, IGR J13020$-$6359, IGR J13186$-$6257, IGR
J15293$-$5609, IGR J17200$-$3116, IGR J17404$-$3655, IGR J17586$-$2129, IGR
J17597$-$2201, IGR J18457+0244, IGR J18532+0416, IGR J19308$+$0530, and IGR
J19378$-$0617). We conclude that 5 of these are active galactic nuclei, 5 are
cataclysmic variables, 2 are low- or intermediate-mass X-ray binaries, and 2
are Be high-mass X-ray binaries.
