The origin of extended emission line regions

We present the results of VIMOS-Integral Field Unit (IFU) and FORS1 spectroscopy of two radio galaxies: PKS1932-46 and PKS2250-41. The two sources display highly extended emission line regions, with varied ionization states and gas kinematics. Both sources appear to lie in rich environments, and may be undergoing interactions with companion bodies. The more distant emitting material generally displays simple, narrow emission line profiles, often at significant velocity offsets from the system rest-frame, and may be formed from the tidal debris of a previous interaction.