  Here we present the results obtained from the analysis of 75 ksec of
XMM-Newton observations of a sample of EROs selected from one MUNICS field
(K'<19.5 mag). We find 6 EROs with a X-ray counterpart down to a 2--10 keV flux
limit of ~10^{-15} cgs. For all of them the X-ray--to--optical flux ratios and
the 2--10 keV luminosities suggest the presence of AGN. In particular, a
complete X-ray spectral analysis shows that high luminosity, obscured AGNs
(i.e. QSO2 candidates) are present in 3 of them.
