  We present the results of spectropolarimetry of a sample of 7 powerful radio
galaxies and 2 quasars with $0.07<z<0.35$ obtained to detect possible
anisotropies in the [OIII] line emission, which could explain the higher [OIII]
luminosity of quasars than that of radio galaxies within the framework of the
Unified Model of radio-loud AGN. We detect polarized [OIII] in 4 radio
galaxies, consistent with the possibility that a considerable fraction ($\sim
20%$) of the observed [OIII] emission is scattered in a similar way to the
hidden nuclear continuum. However, small but detectable rotation between the
polarization direction of the line and of the continuum in two radio galaxies
shows that the geometry of the emitting regions can be different.
