  We have investigated a group of unassociated radio sources included in the
3CR cat- alogue to increase the multi-frequency information on them and
possibly obtain an identification. We have carried out an observational
campaign with the Swift satellite to observe with the UVOT and the XRT
telescopes the field of view of 21 bright NVSS sources within the positional
uncertainty region of the 3CR sources. Furthermore, we have searched in the
recent AllWISE Source Catalogue for infrared sources matching the position of
these NVSS sources. We have detected significant emission in the soft X-ray
band for nine of the investigated NVSS sources. To all of them, and in four
cases with no soft X-ray association, we have associated a WISE infrared
counterpart. Eight of these infrared candidates have not been proposed earlier
in the literature. In the five remaining cases our candidate matches one among
a few optical candidates suggested for the same 3CR source in previous studies.
No source has been detected in the UVOT filters at the position of the NVSS
objects, confirming the scenario that all of them are heavily obscured. With
this in mind, a spectroscopic campaign, preferably in the infrared band, will
be necessary to establish the nature of the sources that we have finally
identified.
