  Despite the plethora of deep (sub-mJy) radio surveys there remains
considerable doubt as to the exact nature of the galaxies contributing to the
source counts. Current evidence suggests that starformation in moderately
luminous 'normal' galaxies is responsible for the bulk of the emission below
1mJy. However given the sensitivities of these surveys we would expect a
fraction of these sources to be distant radio galaxies. Using deep VLA and GMRT
data we have found ~20 high-z candidate radio galaxies in two fields using the
classical ultra-steep radio spectrum technique (De Breuck et al., 2000) and
selecting galaxies with faint (i'>25) optical counterparts. Several of these
sources have X-ray detections in our deep XMM/Chandra observations and have
fluxes high enough to put them in the quasar regime if they lie above redshift
3. Recently performed Spitzer GTO observations and upcoming near-infrared
observations will help reveal the nature of these sources.
