  We report the detection of an X-ray flare on the Bp star sigma Ori E with the
ROSAT high resolution imager (HRI). The flare is shown to have likely occurred
on the early-type star, rather than on an hypothesized late-type companion. We
derive flare parameters such as total energy release, coarse estimates of size
and density, and also present arguments for a magnetic origin of the flare. We
place our observations in the context of a magnetic character of Bp-type stars
and speculate on a common physical basis and connection between Bp and Be
stars.
