  We aim to test a method of efficiently selecting X-ray obscured AGN in the
2XMM-Newton EPIC Serendipitous Source Catalogue. By means of a strong
correlation established using the XMM-Newton Hard Bright Sample between the
intrinsic absorption and the hardness ratio to the 0.5-2.0 keV and 2.0-4.5 keV
bands, an efficient way of selecting absorbed sources has been worked out. A
hardness ratio selection based on the 2XMM-Newton pre-release Source Catalogue
led us to the definition of candidates likely to be obscured in X-rays. X-ray
and optical spectral analysis were performed for three objects. Strong
absorption (NH > 10^{22} cm^{-2}) was detected from the X-ray analysis,
confirming the efficiency of the method used to select obscured sources. The
presence of absorption is also revealed in the optical band, although at a
significantly lower level than inferred from the X-ray band.
