  We report the detection of very broad HI absorption against the central
regions of the radio galaxy 3C293. The absorption profile, obtained with the
Westerbork Synthesis Radio Telescope, has a full width at zero intensity of
about 1400 km/s and most of this broad absorption (~1000 km/s) is blueshifted
relative to the systemic velocity. This absorption represents a fast outflow of
neutral gas from the central regions of this AGN. Possible causes for such an
outflow are discussed. We favour the idea that the interaction between the
radio jet and the rich ISM produces this outflow. Some of the implications of
this scenario are considered.
