Left panels: [Oiii]λ5007 velocity maps of LBQS0109 (top) and HB8903 (bottom) presented in Paper I. Black squares indicate the nine regions where we extracted the corresponding spectra shown in the right panels. Right panels: comparison between the nuclear [Oiii]λ5007 profiles (red) and those from the external regions (blue) of LBQS0109 (top) and HB8903 (bottom). The black dotted line corresponds to the [Oiii]λ5007 central wavelength. Narrow (FWHM ~ 490 km s^-1 for LBQS0109 and FWHM ~ 480 km s^-1 for HB8903) components of the [Oiii]λ5007 emission, identified by the green dashed line, are clearly detected.