  We report the results of Giant Metrewave Radio Telescope (GMRT) observations
of H{\sc i} absorption towards the FRII radio galaxy 3C321 (J1531+2404), which
is associated with an active galaxy interacting with a companion. The
absorption profile towards the radio core is well resolved and consists three
components, of which the two prominent ones are red-shifted by 186 and 235 km
s$^{-1}$ relative to the optical systemic velocity. The neutral hydrogen column
density towards the core is estimated to be
$N$(H{\sci})=9.23$\times10^{21}$(${T}_{\rm s}$/100)($f_{c}$/1.0) cm$^{-2}$,
where ${T}_{\rm s}$ and $f_c$ are the spin temperature and covering factor of
the background source respectively. We also present radio continuum
observations of the source with both the GMRT and the Very Large Array (VLA) in
order to understand the properties of a plume of emission at an angle of
$\sim30^\circ$ to the source axis. This feature appears to have a steep
high-frequency spectrum. The current hotspots and jet are active and seen in
X-ray emission. The spectral ages of the lobes are $\lapp$26 Myr. We discuss
the possibility that the plume could be relic emission due to an earlier cycle
of activity.
